Why AI may overcomplicate answers: Humans and LLMs exhibit “addition bias,” often favoring additional steps over subtraction

Why AI may overcomplicate answers: Humans and LLMs exhibit “addition bias,” often favoring additional steps over subtraction

By Ingrid Fadelli
Publication Date: 2026-02-15 18:00:00

When making decisions and judgments, people can fall into common “traps” known as cognitive biases. A cognitive bias is essentially the tendency to process information in a certain way or follow a systematic scheme…