As the exercise introduces with the example of the two classmates, we can see that a judgmental heuristic is a series of principles or methods by which one makes assessments, judgements, probabilities, etc., simpler. For example the rule that "the faster people talk, the smarter they are" or, another one, the taller a person is, the better they are at basketball. You make an assessment to reduce a quantity, make a probability simpler, to narrow options.
