What is Perplexity?
In computational linguistics, Perplexity measures how surprising or unexpected a word is given the preceding words in a sentence. Large Language Models are designed to pick the mathematically most statistically probable word every single time.
When an AI detector evaluates text with uniformly low perplexity, it flags it immediately: "A human writer would rarely choose such predictable phrasing 50 times in a row."
What is Burstiness?
Burstiness evaluates the variation in sentence structure, length, and complexity across an entire piece of writing.
- AI Writing Profile: Medium length. Medium complexity. Passive voice. Smooth, uniform paragraph flow.
- Human Writing Profile: Spiky! Short sentences. Long parenthetical explanations. Sudden rhetorical questions. Irregular cadence.
How to Manually Boost Burstiness in 3 Steps
- Break Up Long Compound Sentences: Insert punchy 2-to-5 word statements.
- Vary Paragraph Density: Mix 1-sentence micro-paragraphs with 5-sentence detailed thoughts.
- Inject Personal Idioms & Conversational Anchors: Phrases like "Here's the kicker" or "Let's be real for a second" instantly spike perplexity scores.
