Anecdotes often lack rigidity or quantification, and they may be based on preconceived notions rather than genuine hypotheses. You're right in a sense, but you

Anecdotes often lack rigidity or quantification, and they may be based on preconceived notions rather than genuine hypotheses. You're right in a sense, but you have to be careful as to how you sample anecdotes for them to be factual rather than anecdotal evidence. "I talked to some guys from a frat and they were mean, thus all frat guys are mean" does not logically follow.