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Anecdotes feel convincing, but one story proves very little about how common something is

the gist

Anecdotal evidence is evidence built from individual experiences and personal observations, gathered without any systematic method. It can be true or false, and it is not checked the way scientific, legal or historical evidence usually is, so there are few safeguards against exaggeration or invention. The problem is that a vivid story sticks in memory and feels persuasive, even when it says nothing about how often something happens. Researchers disagree about how much people overvalue it: some studies find people lean too heavily on anecdotes, while others find they dismiss them too quickly. Anecdotes still have a use, since they can suggest ideas to test, but they cannot settle a question alone.

so what

Anecdotes shape health advice, product marketing and everyday arguments, so knowing their limits helps you judge claims. Advertisers' testimonials are a familiar example, and some jurisdictions regulate them tightly for that reason.

Adapted from Wikipedia, the free encyclopedia · CC BY-SA 4.0