Vagueness. A vague claim has a meaning that is indistinct or imprecise. A word or phrase is vague if the group of things to which it applies has borderline cases. Moore and Parker's example: bald.. The appropriate criticism of a claim is not that it is too vague, but that it is too vague relative to what you wish to communicate or know.agueness. A vague claim has a meaning that is indistinct or imprecise. A word or phrase is vague if the group of things to which it applies has borderline cases. Moore and Parker's example: bald.. The appropriate criticism of a claim is not that it is too vague, but that it is too vague relative to what you wish to communicate or know.