Human or Machine

A free quiz about the patterns that make writing read like AI output. Each round shows twenty sentences, one at a time. For each, you say whether it was written to sound like a machine or like a person, and how sure you are. Every answer highlights the exact phrase that gives it away, and the end report shows which patterns fooled you.

No, and the quiz does not pretend they are. All forty-eight sentences were written by hand for this quiz. Twenty-four were deliberately built around patterns that are common in AI-generated text, such as stock openers, tidy lists of three and conclusions that commit to nothing. The other twenty-four were written in a specific, uneven human voice. It is a set of examples for learning the patterns, not a sample of real model output.

No. There is no model and no analysis. Every sentence has a fixed answer and a written explanation. This is a hand-built quiz, not a detection tool, and none of these patterns proves that a real piece of writing came from a machine; people use all of them too.

Each round draws twenty sentences, ten of each kind, from the pool of forty-eight and shuffles them, so consecutive rounds overlap only partly. Sentences you have not seen yet are preferred, so a few rounds will show you the whole pool.

Each guess is either sure or maybe. A sure answer scores two points if right and loses one if wrong; a maybe answer scores one point if right and nothing if wrong. The end report compares how often your sure answers and your maybe answers were right, which shows whether your confidence was worth anything.

Your best score and which sentences you have already seen are kept in your own browser so the next round can show you new ones. Nothing is uploaded and there is no leaderboard. It works the same on phones, where you tap the four answer buttons.