beard
boy
brain
bulb
business
choice
concept
conclusion
confusion
contemplation
decision
different
drawing
energy
expression
face
finger
genius
gray
head
idea
intelligence
intelligent
lamp
light
lightbulb
make
male
men
mind
money
overhead
people
person
pondering
problem
puzzle
rational
rationalization
rethink
right
save
sign
smart
solution
solve
student
symbol
think
wall
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