What is survey?

A survey collects self-reported answers from a group of people.

LSAT questions attack surveys on three fronts: who was asked (unrepresentative sample), how they were asked (leading questions), and whether answers can be trusted (people misremember or give the "good" answer).

A survey result is only as strong as its sample and its questions.

Low response rates are a classic tell: the people who answered may differ from the people who did not.