bor·der·line adj. 1.a. Verging on a given quality or condition: borderline poverty. b. Of a questionable nature or quality; dubious: an applicant with borderline qualifications. 2.a. Psychology. Relating to any phenomenon that is intermediate between two groups and not clearly categorized in either group: a borderline state showing the characteristics of both neurotic and psychotic reactions. b. Relating to a condition characterized by a pattern of instability in mood, interpersonal relations, and self-image and manifested by self-destructive, manipulative, and inconsistent behavior: the borderline personality disorder; the borderline syndrome.

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That is indeed the situation with respect to borderline cases, as the view has it. Take Harry, a borderline case with respect to ‘is bald,’ having exactly 3,833 hairs on his scalp. Whatever it is that in the thoughts, experiences and practices of language users determines the meaning of expressions, it fails to determine whether someone with this very number of hairs does or does not fall under ‘is bald.’

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Note added at 14 hrs (2008-08-12 16:36:01 GMT)
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