know shit from Shinola
enough sense to pound sand into a rathole
nous
wit
native wit
know one's ass from a hole in the ground
epistemologically
intelligentially
know like the back of one's hand
smarts
brain
sentient
intelligenced
intellectual
know how many beans make five
brightness
person
epistemically
pellucid
kevalin
intelligential
prehensile
simple-mindedly
devise
Palladian
rocket scientist
genia
practical
sapience
know like a book
ultraintelligent
overstand
folksy
wisdom
noetic
grok
present
perspicaciousness
know-all
entelechially
gormless
IQer
common sense
skill
in one's head
brute
intelligentness
automaticity
brainial
shallow