Grammatical investigations ([1]) have led to the idea that vague predicates such as "heavy", "short", "bald" are used on the basis of a comparison with an implicit standard In the following we consider the predicate "tall", as applied to the set of men of a restricted age range living in a small community. (We do not consider problems arising from the differing use of "tall" across large communities such as the Japanese and the North American). Also, "tall" is taken to be a function of an individual's height, discarding other features that might also be important, for instance that a certain choice of clothes might make one appear of larger height.
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