Fiction vs Non-Fiction: Meaning, Differences and How Australian Authors Choose Between Them

Fiction is prose created from imagination; non-fiction is prose grounded in verifiable fact. The practical difference, for an Australian writer, is not the dictionary entry. It is the contract you take on with your reader, the research you commit to, the way a publisher categorises your manuscript, and what you can honestly say about your own book when someone asks what it is.

Many writers approach this question with a specific manuscript in front of them: a story drawn from a parent's war years, an account of a trial, a recovery narrative, a novel built on a family's migration. The decision is not whether fiction and non-fiction exist as categories. It is whether this particular manuscript belongs in one or the other, and what that choice changes about the work ahead. For an author sitting with a story about their own life, the practical question is often more specific again: is this a memoir, an autobiographical novel, or something between the two.

What Does Fiction and Non-Fiction Actually Mean?

Fiction is prose that invents its material: characters, events and often the setting are built by the writer, even where real places or incidents provide the spark. Non-fiction is prose grounded in verifiable fact: real people, real events, real places or real ideas, where the writer is accountable for what the reader is told. Both are long-standing categories in Australian publishing, and each contains many kinds of book.

What does fiction mean?

Fiction is invented work. A novel, a novella, a short story and a work of flash fiction all share the same core: the writer's primary obligation is to tell a convincing story, not a true one. A fictional work may draw on real places, periods or incidents, and historical fiction, speculative fiction and literary fiction routinely do. The invention sits in the characters, the dialogue, the sequence of events, and the inner lives the writer renders on the page.

A book marketed as "based on a true story" is still fiction once invented dialogue, composite characters, or altered events have entered the manuscript. The inspiration is not the classification.

What does non-fiction mean?

Non-fiction covers more than many writers expect. It includes memoir and autobiography, biography, narrative non-fiction, journalism, history, essay, criticism, and prescriptive or instructional work such as self-help, business, cookery, craft and how-to writing. Some non-fiction tells true stories about identifiable people; much of it does not. An essay on grief, a book on native Australian plants, a guide to doctoral writing and a history of the Melbourne tram network are all non-fiction, and only one of them tells a story about people in the usual sense.

The constant across non-fiction is accountability to what can be checked. The specifics vary by form.

How Do Fiction and Non-Fiction Compare at a Glance?

The distinctions below show where fiction and non-fiction tend to diverge. Treat the table as a compact reference for a specific manuscript, not as a scorecard. The rows unpack in detail across the sections that follow, so skim now and come back to any row.

The two most important rows for a working author are source of material and truth obligation. The others follow from those two in different ways. The next section covers them in detail.

What Is the Real Difference Between Fiction and Non-Fiction?

Four dimensions do the practical work: invention, factual accountability, evidence, and reader expectations. All four shift at the same time when a writer changes category. If you remember only one thing from this section, let it be that the fiction and non-fiction label is a reader-trust decision as much as a shelving one.

Invention

Fiction invents story elements. Characters, dialogue, and the sequence of events belong to the writer. Non-fiction can compress, select, omit, and interpret, but it does not invent core events and still present itself as true. A memoir may reconstruct a scene using the writer's memory and research, and that reconstruction remains a reconstruction of something that happened. The same event becomes fiction the moment the writer invents what was said or who was present and leaves the invention unmarked.

Historical, geographical, technical and cultural details require research even in fiction. A novel set in 1850s Ballarat still has to render the roads, the gold-rush context and the speech patterns credibly. Invention concerns the story. Verifiable background in a fictional work may still carry checkable detail, and getting it wrong is still getting it wrong.

Factual accountability

Non-fiction is accountable for what the reader is told. Names, dates, quoted material, and sequence of events are expected to match the record where a record exists. Where memory, interpretation or acknowledged uncertainty are involved, the writer flags that for the reader rather than treating a guess as a fact. Fiction answers to internal consistency instead: a character's eye colour must stay the same across chapters; the invented city's geography must hold from scene to scene.

Accountability does not mean every memoir needs academic footnotes. It means the writer takes responsibility for the differences between what happened, what has been reconstructed, what has been interpreted, and what has been imagined.

Evidence

Non-fiction relies on evidence a reader can trace: cited sources, interviews, named documents, archive material. Fiction relies on evidence a reader can feel: a convincing scene, a credible character, specific physical detail. Both are forms of evidence; one is externally checkable, the other is lived. Writers in each form sometimes borrow techniques from the other, which is why narrative non-fiction reads like a story and literary fiction can carry a texture of research.

Reader expectations

The category sets the reader's expectations before the first page. A non-fiction reader forgives a slow passage but not a fabricated fact. A fiction reader forgives an invented detail but not a flat character. The label on the cover is not cosmetic. It tells the reader what kind of attention to bring and what kind of trust to extend. The sections below show the two forms working on the page, which is the clearest way to see those expectations in practice.

What Does Fiction Writing Actually Look Like?

Fiction writing shows itself most clearly in scene. The passage below is one example of a short invented scene; the analysis that follows names the choices on the page.

Fictional passage: an invented example

The gate was a different colour. Mara noticed that before she noticed the dog or the car or her own hand still on the ignition. Someone had painted it a deep green so dark it was almost black, and it stood against the gravel drive like a line drawn by a stranger. She did not turn the engine off. She sat and watched a magpie walk across the roof of the shed. Eleven years. Eleven years and a different gate.

Four craft decisions sit visibly in that passage. First, the point of entry is a small physical detail rather than a summary of events: the gate's colour. The reader meets the character in the middle of a specific noticing, not in a backstory. Second, the character's interior stays close and selective: she notices the gate before the dog, before the car, before her own body. Third, the sentences carry the character's state through rhythm as much as through content. Short, flat sentences do the work a stalled thought does. Fourth, the passage lets the reader fill in meaning that is deliberately not stated: who Mara is to this place, why eleven years, what the colour of the gate signifies to her.

Nothing in the invented part of that passage asks for an external source. The decisions were the writer's. A longer draft could still carry checkable detail (the species of the magpie, the gravel appropriate to the region), and the writer would still be expected to get that right.

What fiction writing covers in practice

Fiction writing in Australia breaks down along several lines, and most working writers sit in more than one.

Literary fiction prioritises character, voice, structure and theme. It is the territory of the Miles Franklin Literary Award, the Stella Prize, the fiction categories of the Prime Minister's Literary Awards, and the Patrick White Award, which recognises a writer's body of work. Literary fiction can be plot-rich. The plot usually serves character.

Genre fiction organises itself around reader expectations within a category: crime and thriller, romance, speculative fiction (science fiction and fantasy), horror, and historical fiction. Each category has conventions that reward the reader who comes looking for them. Genre fiction can carry serious literary craft, and literary fiction can run on a tight plot. The two overlap more often than they divide.

Age category is a different axis. Young adult, middle grade and children's fiction are grouped by intended audience, not by narrative form. A young adult novel can be literary, speculative, historical, contemporary or crime.

Form sits on another axis again. Novel, novella, short story, flash fiction and verse novel are forms. Australian literary journals and anthologies publish short stories and remain a legitimate route for building publication credits before pitching a longer project. For writers at the ideation stage, Creative Short Story Ideas is useful at the short end, and Creative Book Ideas at the longer end.

Fiction writing is disciplined work. Decisions about point of view, scene selection, pacing, and voice are not optional. Authors who want substantive support on a long fiction project can look at Sydney Book Publishers' fiction ghostwriting services.

What Does Non-Fiction Writing Actually Look Like?

Non-fiction writing shows its particular work most clearly when a specific, verifiable claim is on the page. The passage below demonstrates the shape; the analysis names what makes it non-fiction rather than fiction.

Factual passage: based on a published Australian source

The 2016 Macquarie University and Australia Council for the Arts Survey of Australian Book Readers reports crime, mystery and thriller as the most popular fiction category among Australian readers, cited by 48.5% of respondents, with historical fiction at 36%, contemporary and general fiction at 33.4%, and science fiction at 32.2%. In non-fiction, autobiography, biography and memoir lead at 45%. The findings were released in 2017 by the Australia Council for the Arts (now Creative Australia). More recent reader-preference data should be checked against subsequent releases on creative.gov.au before being treated as the current picture.

Note the structure. The source and reporting period are named within the passage, which is how non-fiction attributes a factual claim. The figures are given with the survey date attached because they are findings from a specific study, not timeless statements. The passage flags that reader-preference data changes year to year and directs the reader to the current source rather than treating the stated numbers as present-day fact. Nothing in the passage invents dialogue, interior thought, or a scene; the writing serves the information.

The contrast with the fictional passage is not that one is dull and the other is vivid. Narrative non-fiction, memoir and essay can be as particular and as alive as fiction. The contrast is that this passage can be checked against a published document; the fictional one cannot and does not need to be.

What non-fiction writing covers in practice

Memoir covers one slice of a real life, usually organised by theme, period or relationship. The writer's memory is the primary source, and that primary source is subject to the limits of memory, which is why reconstruction and composite characters are handled transparently when they are used. Autobiography covers the full life, usually chronologically, by the person who lived it. Biography covers another person's life, researched and sourced.

Narrative non-fiction tells true events using the storytelling techniques of fiction: scene, pacing, point of view. The events must be true; the sourcing must be traceable. Journalism applies similar standards to shorter, often time-sensitive subjects, with interviews and documents as primary sources. History sits beside both, with longer-form argument and heavier primary-source and archival research.

Essay is a different shape again. The subject may be anything from a personal experience to a political argument to a close reading of a poem. Prescriptive and how-to writing (business, self-help, cookery, craft, teaching) is non-fiction organised around a reader's problem and the writer's response.

Non-fiction authors drawing on specific subject expertise or lived experience sometimes need writing or editorial collaboration to shape a book. Sydney Book Publishers' non-fiction ghostwriting services support authors who have the material and want a collaborator on the manuscript itself.

Where Does the Line Blur Between Fiction and Non-Fiction?

Five forms sit near the boundary, and knowing which one a manuscript belongs to prevents mis-pitching and mis-shelving. Each has its own rules.

Creative and narrative non-fiction

Creative non-fiction uses literary craft (voice, scene, image, interiority) in service of true material. Narrative non-fiction leans more heavily on the story shape of a true event. Both remain non-fiction. The writer may use scene and dialogue; dialogue is reconstructed from a verifiable basis (recordings, interview notes, documented accounts, the writer's own memory of specific exchanges) rather than invented. Australian creative non-fiction is a well-respected category with a long active history.

Autofiction

Autofiction is a novel transparently drawn from the author's life, presented and shelved as fiction. The author takes the fiction label and the artistic latitude it allows: invented dialogue, altered sequence, reshaped characters. The reader understands the "I" is substantially the author. The category assignment is fiction. The implicit contract with the reader is lower on literal accuracy and higher on emotional recognition.

Roman à clef

In a roman à clef, real people and events appear thinly disguised. The form is categorised as fiction, and the fictional label does not displace legal considerations where real individuals remain identifiable. The legal section below touches on the point.

Historical fiction

Historical fiction places invented characters inside real historical events, and often features real historical figures as well. The research obligations for the setting (place, period, technology, speech patterns, documented events) are closer to a historian's than to a contemporary novelist's. The author retains fictional licence over invented characters and their inner lives, and may also render real figures in dramatised scenes, usually with an author's note clarifying where documented history ends and interpretation begins. The manuscript is categorised as fiction.

Memoir using the techniques of fiction

Scene, reconstructed dialogue, pacing and point of view are available to memoir and routinely used by respected memoirists. The work remains non-fiction. Honest reconstruction (writing a scene the writer witnessed, using memory and corroborating sources) differs from invention (adding events that did not happen or inventing dialogue in a conversation the writer was not part of). Composite characters and compressed timelines are more sensitive and, where used, are usually disclosed to the reader in an author's note or front matter. Where invention becomes substantial, the honest category may shift from memoir toward autofiction or novel.

In every one of these forms, the test is the same. What is the writer promising the reader, what can the writer defend to a publisher, and what can the writer defend to any third party who later has a stake in the story?

How Do Australian Publishers Categorise Fiction and Non-Fiction Manuscripts?

Australian publishers categorise manuscripts at the point of acquisition, and the chosen category drives a chain of practical decisions that follows. Metadata systems, retailer placement, library records and sales reporting all depend on that first classification.

Two subject-code systems do most of the international work. Thema is maintained by EDItEUR and is widely used by Australian trade publishers for metadata on physical and digital editions. BISAC, maintained by the Book Industry Study Group in the United States, is used by many retailers and distributors. The two systems are related but are not interchangeable, and a book may carry different codes in different markets or on different platforms. Fiction and non-fiction sit under separate top-level ranges in both systems, so a manuscript's category drives the whole code tree that applies to it. Primary-subject and additional-subject rules differ between the systems, and metadata is a description of the work rather than a legal guarantee of factual accuracy.

Library classification is a separate matter. Australian public libraries typically shelve non-fiction using the Dewey Decimal Classification and shelve fiction alphabetically by author surname. School, specialist and tertiary libraries may use variations. A library's placement rules are not the same as a retailer's category metadata, and neither is identical to a sales-reporting classification.

Nielsen BookScan Australia tracks sales by its own category structure (adult fiction, adult non-fiction, children's, and so on). Those categories are related to publisher metadata without being identical to it. Being coded as fiction in Thema does not automatically translate to a specific Nielsen bestseller chart category.

Manuscript positioning at submission reflects all of this. An Australian agent or acquiring editor expects the writer to name the category clearly in the first paragraph of a query or proposal, and to list comparable titles ("comps") from the same category. Comps that cross categories signal that the writer does not yet know where the book sits. Memoir pitched into fiction, or a prescriptive book pitched as literary non-fiction, reads as a positioning problem before anyone opens the sample pages.

Hybrid forms still get a single primary category. Autofiction is categorised as fiction. Memoir, including memoir using the techniques of fiction, is categorised as non-fiction. Narrative non-fiction is non-fiction. The author's note handles disclosure where composite characters or reconstructed scenes appear.

The practical point for a writer deciding is this: the category question is settled early, and the whole production chain downstream (cover, metadata, retail placement, library catalogue, sales reporting) assumes the decision was deliberate. For an overview of local trade publishing, Top Book Publishing Companies in Australia is a useful starting point. Where category positioning connects to marketing choices, Sydney Book Publishers' book marketing services help match the two.

How Does Writing Fiction Differ From Writing Non-Fiction, Day to Day?

Fiction and non-fiction demand different daily working rhythms. The job is different, not harder.

Fiction day to day

A fiction writer alternates between generating new scenes and revising existing ones. Outlining and discovery drafting are both legitimate approaches, and most working novelists sit between the two.

New scene work asks: where does the scene start, what does the point-of-view character notice first, what are they not saying, where does the scene end? The scene lives or dies by what the writer chooses to leave out. Character maintenance means tracking what each character knows, what they are hiding, what they have done so far, and whether a planned action still fits. Many fiction writers keep a character bible for a long project. Voice and sentence revision happen on a different pass: reading aloud, cutting throat-clearing, listening for the particular rhythm the viewpoint character carries.

Revision in fiction can add material, remove material or reorganise it. A weak chapter often means a missing scene earlier, not an excess scene within it. The usual passes are developmental revision (does the story work), structural revision (do the chapters sit in the right order), line editing (does each sentence do its job), copyediting and proofreading. Developmental and structural work can overlap, and a competent editor often handles both in the same pass.

Non-fiction day to day

A non-fiction writer runs research, drafting and sourcing in parallel.

Source management means keeping a running record of what each claim rests on, in a form the writer can retrieve months later during fact-checking. For memoir, that record includes the writer's own memory, journals, photographs, letters and corroborating accounts from other participants. Interview and primary-source work covers planning questions, recording where permitted, transcribing, and keeping clear the difference between a verbatim quotation and a reconstructed statement based on notes or recall.

Permissions tracking is routine for extended quotation from other works, for photographs, for reproduction of substantial material that carries its own rights. Short attributed quotations are often covered by fair dealing provisions, though manuscript-specific concerns are worth raising with a publisher or qualified adviser.

Fact-checking happens as the writer drafts, not only at the end. Claims accumulate, and unchecked claims accumulate faster. Non-fiction revision passes may include a dedicated fact-check and, for sensitive material, a legal read; neither is universal, and the mix depends on the manuscript. Sydney Book Publishers' book editing services cover both fiction and non-fiction manuscripts, with the pass structure adapted to the work.

A quick decision test

If, over a day's writing, the writer finds themselves asking "did this happen, who else was there, where can I check that" more often than "what would this character do and feel", the manuscript sits closer to non-fiction. If the daily questions run the other way, fiction is closer to the honest answer. Punctuation choices (such as the difference between the em dash and the en dash) can also give a scene or a sentence a particular pace; Em Dash vs En Dash covers that distinction without using the em dash itself.

What Legal and Ethical Risks Should Australian Authors Know About?

Australian authors face three essential considerations in both fiction and non-fiction: defamation of identifiable real people, permissions for substantial reproduction of other works, and accurate representation of real individuals and events. Defamation law is largely harmonised across Australian states and territories through model provisions, with local variations, and the fictional label does not automatically remove defamation risk where a character is identifiable. Identifiability does not by itself establish liability; the surrounding analysis is what matters, and manuscript-specific concerns are best taken to a lawyer who works with publishing law.

Permissions matter where a manuscript reproduces substantial material from another work. Short, properly attributed quotations are often covered by fair dealing. Longer excerpts, song lyrics and photographs usually warrant written permission, and the rules are not identical across every quotation.

Non-fiction and memoir carry a specific responsibility to represent identifiable real people fairly. Proofreading addresses sentence-level accuracy and is not legal clearance; book proofreading services are a final polish, not a substitute for appropriate advice.

How Does Fiction vs Non-Fiction Change Your Publishing Path?

Fiction and non-fiction take different paths to publication from the first email the writer sends, and the production path downstream differs too.

For debut fiction, Australian agents and acquiring editors usually ask for a completed manuscript, a short query letter, a one-page synopsis and two or three sample chapters, though specific requirements vary by recipient and should be checked case by case. The judgement is made on the writing itself. Established fiction writers may sell on partial manuscripts or proposals, depending on their track record and the project.

For non-fiction, the picture varies by form. Prescriptive and subject-expertise books (business, cookery, how-to, self-help, craft) are often sold on a proposal that includes an overview, a market analysis, an author platform statement, a chapter outline, and one polished sample chapter. Memoir and narrative non-fiction may require a substantial completed sample or a complete manuscript, because the voice and the handling of real material matter as much as the premise. Journalistic and current-affairs non-fiction can be commissioned on a proposal where the writer has an established track record.

Platform is one of several considerations in non-fiction acquisition, not a single gate. Subject expertise, relevant lived experience, research access, and audience reach each contribute differently to different projects. A memoir may lean on experience; a business book may lean on professional standing; a work of popular history may lean on scholarly or journalistic authority. Writing quality still matters. The simple statement that platform always outweighs the writing is not accurate across the whole category.

Self-publishing is a legitimate route for both categories and takes similar production steps: structural work, line and copy editing, proofreading, interior formatting, cover design, metadata and distribution. Interior formatting conventions differ. Non-fiction uses hierarchical headings, numbered or named chapters, and sometimes sidebars, pull-quotes, and diagrams. Fiction uses minimal interior design, with typographic emphasis on readability. Sydney Book Publishers' book formatting services handle both conventions, and font choices by genre and format are covered in Best Book Fonts by Genre and Format.

Cover design follows the category in tendency rather than rule. Non-fiction covers often lead with subject-first typography and credibility signals. Fiction covers often lead with mood, image, and genre cues. Hybrid forms and distinctive design cross those tendencies regularly. Book design services address both.

Print production decisions apply across categories: short-run digital printing, print-on-demand distribution, offset for larger runs. Digital Book Printing vs Print on Demand covers that comparison.

Writers also mix routes across their career. An author who publishes one book traditionally and another independently is organising their own path, not using a hybrid publishing company; the two situations are different. Self-Publishing vs Traditional Publishing in Australia covers the route decision in more depth, and full publishing support from manuscript to launch sits under Sydney Book Publishers' book publishing services.

How Should an Australian Author Decide Which to Write?

Choose fiction when the truth you want to tell is better served by invented characters and events, and when storytelling craft is what you bring. Choose non-fiction when the material is real, when you have specific credentials, lived experience, or research access, and when the reader needs to trust that what is on the page actually happened. A short set of honest questions makes that specific for a particular manuscript.

A decision framework

What is the core promise to your reader? A story they can lose themselves in, or a verifiable account they can trust and act on. The answer sets the category.

What do you bring to this manuscript? Storytelling craft, lived expertise, professional credentials, research access, interviewing skill, or a readership that already looks to you on this subject. Different inputs suit different forms, and a specific project may draw on more than one.

What are the implications of the people, events, or sources this book draws on? If identifiable real people play significant roles, the manuscript needs the right form and the right disclosures either way, and an early conversation with a publishing-literate lawyer is cheaper than a late one.

Can you sustain the research and sourcing discipline that non-fiction requires? Writers often know this already from short-form attempts. If a short essay on the same material comes more easily than a short story on the same material, that is a signal.

Where is your current readership, and what do they expect from you? A new category can mean rebuilding readership from scratch; sometimes that is the right move anyway.

Do you have subject expertise or research access that would strengthen a non-fiction treatment of this material? A book that could be told either way often finds its answer in the honest audit of what the writer actually has: more material, or more craft.

A practical test

When the answer is not clear, write a short sample in each form on the same material before committing a year to one. A thousand-word memoir attempt and a thousand-word short-story attempt on the same incident will show the writer which discipline they sustain more honestly than any plan does. The manuscript will tell you faster than the outline.

The decision is also not permanent. Many Australian writers cross between the two across a career, which the next section covers.

Can You Write Both Fiction and Non-Fiction?

Yes, and many Australian writers do. Helen Garner has published novels, essays and literary non-fiction across her career. Thomas Keneally has written both novels (including Schindler's Ark, which won the Booker Prize in 1982) and substantial Australian non-fiction. These are examples of writers moving across fiction and non-fiction over time.

Kim Wilkins publishes speculative fiction under her own name and women's contemporary fiction as Kimberley Freeman. That is an example of a pen name used across two different fiction audiences, not across the fiction and non-fiction line, and the two situations are worth distinguishing.

A pen name is useful when two audiences expect such different books that one brand would confuse the market. Many writers do not need one; a single name across a varied catalogue works when the readership is willing to follow. The decision is about audience clarity rather than a signal of seriousness, and neither literary fiction nor commercial fiction is a more respectable identity than the other.

Practical set-up matters when a writer works across audiences. Author websites, metadata, pseudonym declarations and marketing material are easier to organise before launch than after. Writers who collaborate on multiple projects across categories can look at Sydney Book Publishers' book ghostwriting services, and overviews of local collaboration options sit in Top Ghostwriting Companies for Australian Authors.

How to Describe Your Book Clearly to Readers

Describe your book clearly by naming its category, its specific subject or hook, and (where relevant) a comparable reference point in a few short sentences. That short description serves a query email, a bookshop pitch, an author bio and a conversation at a dinner table, because it answers the three things a reader subconsciously asks: what kind of book is this, what is it about, and what reading experience should I expect.

The short description

Line one, category: fiction or non-fiction, with the sub-category attached (crime, literary, memoir, narrative non-fiction, prescriptive). This is the Thema and BISAC answer in plain English.

Line two, subject or hook: one specific sentence about what the book is actually about, not what it is like.

Line three, reference points (optional, and more useful in a submission or positioning document than in a bookshop blurb): one or two comparable titles that place the reader's expectations in the right territory. Australian comps work well locally, though they are not the only option, and reader-facing blurbs often do without comps altogether. For the shorter blurb that lives on retailer pages and the back cover, How to Write a Book Blurb covers the specifics.

The shelf test

Imagine a reader who has heard about your book from a friend walking into an Australian bookshop. Which shelf do they look at first? That shelf is your category. If your description points the reader to the wrong shelf, the description is wrong, not the book.

Disclosure when the book is hybrid

For autofiction, roman à clef, composite-character memoir, or heavily narrativised non-fiction, add a short author's note at the front of the book stating what has been invented, composited or compressed. An author's note does not automatically resolve legal considerations, and it does not make an unsuitable category assignment suitable, but it does give the reader an honest frame.

Describing a book clearly does not guarantee sales. It does make the book easier to recommend, easier to shelve, easier to find, and easier to defend. For any author who finds this part harder than the writing itself, Sydney Book Publishers can work through category positioning as part of a tailored conversation.

Ready to Choose a Direction for Your Book?

If you have a manuscript or an idea and the category question is still open, Sydney Book Publishers can help you work through it. In a conversation about your project, you can describe the subject or premise, the current stage of the writing, whether it contains invented material and how much, the intended audience, and the specific decision you want help resolving. From there, the right editorial, ghostwriting, or publishing support becomes clear.

Reach out when you are ready to settle the category question, and the next step with it. A single clear decision at this stage saves rework later, in editing, in submission, and in production, where the implications of a mismatched category grow more expensive to correct.