Vague Pronoun Finder
Paste a draft to find the pronouns that make a reader guess what they point at: a sentence that opens with This limits… or These suggest…, a , which that comments on a whole clause, a bare Which or a paragraph that opens with It. Each flag gets a reason and nouns to try. Free, no sign-up.
Runs entirely in your browser — your text is never uploaded.
Paste or type some text to see its vague pronouns — this, that, these, those, which and it with nothing clear for them to point at.
How to Use the Vague Pronoun Finder
- Paste your text. Include the sentence before each place you are unsure about: a pronoun can only be judged against what comes before it. The check runs in your browser.
- Read the colours. Rose is a likely vague pronoun and amber a possible one. Hover over a highlight for the reason.
- Open the cards. Each shows the sentence, why it was flagged and, for this/these and which, nouns that often fit the verb — This finding suggests, These results indicate.
- Decide. If the reader can only mean one thing, leave it. If they could mean two, name the thing. If you are not sure yourself, that is the sentence to rewrite.
What Makes a Pronoun Vague
A pronoun borrows its meaning from an earlier word or idea, its antecedent. It is vague when the reader has to guess that antecedent. The commonest case is a broad reference: this, that, which or it pointing not at one noun but at a whole sentence or a stretch of argument. The sample was small. This limits what we can conclude. Does this mean the size, the fact that it was small, or the sampling method? The writer knows; the reader has to decide.
The Five Patterns It Looks For
| Pattern | Example | Why it is flagged |
|---|---|---|
| Sentence opens with This, These, That or Those and then a verb | Scores rose. This suggests the policy worked. | The pronoun stands alone, so it could point at the whole sentence or one idea in it. This study… (a determiner before a noun) is fine and is not flagged. |
| this or these after a conjunction | Participants were tired, and this reduced accuracy. | The same problem inside one sentence: the clause before it offers several things to point at. |
| , which + a verb that comments on the whole clause | The sample was small, which limits generalisability. | Which refers to a whole clause here, not to sample. A closing comma (The method, which fits, is cheap) shows it belongs to a noun, and then it is not flagged. |
| A sentence that opens with Which | Demand fell. Which is why the shop closed. | A fragment: there is no clause for which to attach to. |
| It opens the first sentence of a paragraph | (new paragraph) It had flaws that the authors did not discuss. | Nothing earlier on the page for it to match. Dummy-subject uses (It is clear that…, It seems…, It rained) are recognised and skipped. |
Copular sentences get a lighter touch. This is the official example or These are real articles introduce a thing the next words name, so they are not flagged; This is important and This is why… comment on something earlier, so they are flagged as possible. That and those are always marked possible, because That said and those who are common, legitimate uses.
How to Fix One
- Add the noun. This limits what we can conclude → This limitation limits… or, better, name the thing: The small sample limits….
- Rebuild the sentence around a noun. Participants were tired, and this reduced accuracy → Participants were tired, and their fatigue reduced accuracy.
- *Replace the broad which with a summarising noun. The sample was small, which limits generalisability → The sample was small, a limitation that restricts generalisability.*
- *Join or recast a stray Which. Funding ended in June, which is why the project closed or Funding ended in June, so the project closed.*
What It Cannot Do
It does not decide which of two nouns it or they means, because that depends on meaning, not on word patterns: in The committee sent the proposal to the board, and it was rejected, nothing on the surface says whether it is the proposal or the board. It does not check he, she, they either. And it needs the sentence before a pronoun to judge it, so a text pasted from the middle of a paper will show It at the top of a paragraph that has a perfectly good antecedent a page earlier.
How Accurate Is It?
On the 20 hand-written vague passages it was built around it found all 20 and flagged none of 30 clear ones. On a second set, written afterwards and tried before any tuning, it found 17 of 20 and wrongly flagged 1 of 30; those misses and the false alarm were fixed afterwards. Those are tidy sentences. On about 17,400 sentences of edited prose from this site's own guides it raised 32 flags, roughly 2 per 1,000 sentences. The sentence-opening This/That/These/Those flags were nearly all fair; roughly half the , which flags pointed at a noun that the sentence made clear. That is why , which flags are mostly marked possible.
Worked Example
The Try an example passage has 67 words and 11 sentences. The finder flags 6: five likely (This worries the department, …, which limits generalisability, These suggest the scale is sensitive, a paragraph-opening It had flaws, and Which is why we report medians) and one possible (…, and this reduced accuracy). It leaves This study examines three schools alone, since this modifies study, and The method, which is simple, works well, since the commas show which belongs to method.
Before
Enrolment dropped by a third in the first year. This worries the department.
After
Enrolment dropped by a third in the first year. This drop worries the department.
Before
The sample was small, which limits generalisability.
After
The sample was small, a limitation that restricts generalisability.
Frequently Asked Questions
- What is a vague pronoun reference?
- It is a pronoun whose antecedent, the word or idea it stands for, is unclear, missing or could be read two ways. Writing handbooks usually call the case where this, that, which or it points at a whole idea a broad reference. The fix is to name the thing: This finding…, The small sample….
- Is it wrong to start a sentence with “This”?
- No. This study examines three schools and This result is robust are fine because this modifies a noun. The pattern to watch is This followed directly by a verb (This shows…, This means…), which leaves the reader to decide what this points at. Where a single noun in the last sentence is the obvious referent, you may keep it, but adding the noun costs one word.
- What is a broad-reference “which”?
- It is a which that refers to the whole preceding clause rather than to the noun just before it: The sample was small, which limits generalisability. The usual fixes are a new sentence beginning with This plus a noun, or a summarising noun: …, a limitation that restricts generalisability. Which with a clear noun antecedent (the method, which is simple) is fine.
- Why does the checker not flag “they” or “he”?
- It is limited to this, that, these, those, which and it. Ambiguity between two possible people or things depends on what the sentence means, and a rule-based tool cannot judge that reliably. If a sentence names two people or two nouns before a he, she, it or they, check it by hand.
- Why was a sentence I think is vague not flagged?
- The checker looks for specific patterns, so it misses a vague it in the middle of a paragraph, a this that follows a verb it does not know, and anything that depends on meaning. Treat an empty result as not finding the patterns, not as proof that every pronoun is clear.
- Is my text uploaded anywhere?
- No. The finder runs entirely in your browser; nothing you paste is sent to a server or stored.