Abstract

My interest in semantic categories arises out of consideration of what is often called structural entailment. Consider the following: 1. Lisa quickly left; so Lisa left. The first of the two sentences in (1) entails the second; necessarily, if the first is true then so is the second. Moreover, (1) is an instance of a more general pattern whose validity doesn’t seem to depend on the specific meanings of the words in (1). The adverb ‘quickly’, for example, can be replaced with any of a wide range of adverbs without loss of validity; analogous remarks hold for the verb ‘leave’. Here are a few more paradigm examples of structural entailment