People incorrectly (a) often think that it is unlikely that two individuals among 30
people will share a birthday; (b) often think that more words begin with the letter
"K" than have "K" in the third letter position; and (c) often estimate that the
Mississippi River is shorter if they first answer if it is longer or shorter than 500
miles than if they first answer if it is longer or shorter than 5000 miles. These
ways of thinking reflect, in order, what heuristics?
