unstupid
nonstupid
undumb
unsilly
nonsilly
unidiotic
unannoying
unchildish
unfoolish
unfuzzy
uncrazed
nonfuzzy
nonfallacious
unridiculous
unfallacious
unludicrous
non-nonsense
nonintentionalistic
unannoyable
nonignorant
unignorant
sharp as a bowling ball
unbullshit
unbaffled
noncrazy
uncrazy
unchided
unlame
un-pathetic
unvague
nonvague
unwrongful
uninsipid
unfooled
nonspurious
unspurious
unmischievous
nonmischievous
not as green as one is cabbage-looking
nonerroneous
unconfuted
unfalsified
nonirrational
unerroneous
unoffended
ungeeky
untrivial
unguileful
unstumped
unirked