Vagueness (n.) is no defect in words; to think it is would be like saying the light of my reading lamp is no real light because it has no sharp boundary.
Vagueness (n.) said of all sense-experience is a metaphysical misuse: the word used without an antithesis, when ordinarily vagueness is opposed to clearness.
Vagueness (n.) is the hardest thing to represent in these investigations.
Vagueness (n.) and unclarity are always relative to something posited as the standard of clarity.
Vagueness (n.) can be fenced: limits mark an inexact concept as a wall on firm ground marks a swamp without being its boundary.
Vagueness (n.) appears in 'the book is lying on the table' when one cannot say whether a book still counts as lying on it.
Vagueness (n.) can be justified in ordinary sentences; at some point one says, now that can surely be taken for granted.