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Two ways to do the same reading. Both are free below, and the email in your inbox has both as well, so you won't lose anything if you'd rather come back to it later.
Option one
The reading is the prompt. Copy it, paste it into ChatGPT, Gemini, Copilot, Claude, or anything else that takes a long instruction, and it'll ask you for your three samples.
You are running a messaging diagnostic called the Stranger Test on three writing samples from one person. Ask me to paste all three samples and one line about what I sell, then wait for them before analyzing anything. Once you have them: Judge only what is on the page. Never invent a quote. Every quote you use must appear word for word in the sample you attribute it to. If the samples are too thin to support a finding, say so rather than reaching for one. Weigh the evidence honestly. Under about 400 words, a sample shows a tendency but not a settled pattern. Above 600 the rhythm is properly readable. Say up front how far this evidence goes, and name what you'd need more text to be sure about. Never deliver a hard verdict on thin evidence. QUESTION ONE: who wrote this? Reading all three with the names stripped off, would a stranger conclude one person wrote them, and could they describe that person? Weigh sentence length and how much it varies, paragraph shape, punctuation habits, fragments, contractions, whether it says I or we, register, how pieces open and close, and word choices that repeat across all three and are not just the topic. Give one verdict: RECOGNIZABLE - one author is clearly detectable across all three and can be described INCONSISTENT - the three read like different writers ANONYMOUS - consistent, but with no distinguishing features, the default voice of the category QUESTION TWO: what do they sell that nobody else does? Test every claim by mentally dropping a competitor's name into the sentence. Flag category stock phrasing, absence of concrete nouns and numbers, whether the writer ever takes a position or disagrees with anything, whether a mechanism is named or only an outcome, and whether claims carry proof or are simply asserted. Give one verdict: CLAIMED - a specific claim only this business could make, appearing in more than one sample INTERCHANGEABLE - every claim survives a competitor's name being swapped in UNSTATED - they never say what they do differently at all Then give me, in this order: 1. The two verdicts, plain, with one short line on how far the evidence goes. 2. Two or three sentences on what you found for each question and why. 3. Three quotes for each question, word for word, each with one sentence on what it shows and which sample it came from. 4. A portrait: two or three sentences describing the writer as a stranger would see them, written so I can agree or disagree with it. 5. The single most revealing line from any sample, quoted. 6. One or two sentences on what the two verdicts mean together. Write in plain, direct, warm American English. Contractions are fine. Never use an em dash. Never use the construction "it's not X, it's Y". Address me as you. Be specific and unsparing, but never sneering.
Roughly 450 words. It's in your email too.
Option two
Paste your three samples in and the tool builds the whole report for you. Nothing you paste is stored.
What to paste
Whichever option you picked, the reading is only as good as what you hand it. Three pieces, chosen like this.
Pick the pieces you're proudest of. That's the honest version of this test.
A services or sales page, an email you actually sent, and an about page or long post. Three of the same type will look consistent because the format is consistent, and that tells you nothing.
Rhythm is the strongest signal in a voice, and you can't read rhythm off nine sentences. Take the names out, yours and your company's, because a stranger wouldn't have them either.
If AI wrote it and you barely touched it, paste it anyway. That's the most useful result this produces.
You're about to read your own writing the way a stranger does, with no idea who you are and no goodwill built up. Almost nobody does that on purpose.
Whatever verdict you get, reply to the email I just sent you, the one with Your Stranger Test prompt in the subject line, and tell me which one you got. I read every one, and what comes back is shaping what I build next.
Kara
When you want the whole picture
The Fingerprint File reads 30 to 40 pieces of your everyday writing, like sent emails, Slack replies, forum comments, and drafts you never edited, and counts the habits that make it yours. Every one comes with examples from your own writing and the piece each came from. Then you decide what to keep for your brand, and it picks the passages that show those habits, each tagged with the habit it carries, ready for your AI.
$97. It runs in your own Claude account on a paid plan (Pro or above). If it won't run on your setup, I can get it working or refund you within 30 days. Updates are included.
See how the Fingerprint File works