Glossary

Plain-English definitions of the technical terms behind AI writing and AI detection.

• Burstiness

  Variance in sentence length across a piece of writing. Human text is bursty; AI text is uniform.

• Perplexity

  How surprising the next word is given the previous words. AI text has lower perplexity than human text.

• AI Detector

  A classifier that estimates whether a piece of text was generated by an AI model.

• AI Humanizer

  A tool that rewrites AI-generated text to read more like writing produced by a person.