I Aren't.
Can anyone explain the logic -not the precedent- of changing how we conjugate the verb ‘to be’ when speaking interrogatively? We say, “I’m tall, aren’t I?” Or “I’m your partner, aren’t I?” We do not say “I’m tall, am I not?” and I don’t know why.
The asymmetry of it bothers me enormously, to say nothing of the fact that if we expand the contraction we’ve said, “I am tall, are I not?”
Is it merely that the colloquialism (or malapropism) is preferable to sounding pretentious? Any ideas?
(This post is dedicated to my absolute idol Raynor Ganan, who likes it when I ask about problems I might research instead).
Update: many great answers in comments, reblogs, and notes! Superfluidity obtained from the brilliant scholar David Crystal this wonderfully comprehensive explanation.