This dissertation articulates and defends a view about linguistic competence called 'variabilism'. According to variabilism, the epistemic demands of full linguistic competence vary in a particular way. More specifically, variabilism holds that different individual lexical application conditions (individually essential metaphysical ways of being…

The meaning of a word often cannot be formulated by conscious rules, because it is unconscious. Evidence on the verb "break" demonstrates this. The consequence for teaching is that teachers cannot supply meanings in words, but should present a wide range of uses of a word, so that students can intuit the unconscious generalization. (Author)

A study focused on the nature and effect of constraints on the hypotheses that learners make about the meanings of words. Two experiments were conducted at a large midwestern university: the first, involving 68 undergraduate students divided randomly into two groups, tested taxonomic and durative constraints on nouns, and time of day and cessation…