Sentence-length variation
How much sentence length changes within this sample.
Text evidence analyzer
See the patterns.
Keep the context.
CouldItBe measures surface features in text and explains what they may—and may not—mean. It cannot determine authorship or recommend consequential action.
Local analysis
Examine surface patterns
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AI-pattern signal
Waiting for text
Local measurements and document-aware explanations will appear here.
Privacy and methodology
What the measurements mean
Measurements describe visible structure and wording only. The paired-pattern review is document-aware, abstains where evidence is too limited, and must be considered alongside counterexamples and provenance.
Vocabulary distribution
How broadly words are distributed across moving passages.
Repeated phrases
Repeated three-word sequences; topics, quotations, and templates can create them.
Transitions and hedges
Linking and qualifying words that may reflect genre, editing, or style.
Template-shaped phrases
A small fixed list of common formulaic phrases, never a universal signature.
Citation-shaped patterns
Reference-like forms, not validation that a source is accurate.
Style shift
A change in average sentence length between halves of the document.
Evidence state
A review state—not a classification of who or what wrote the text.