doubtful
妖しい
怪しい
adult
analytical
attention
background
believe
boy
brain
business
complex
concept
contemplate
decision
doubt
dubious
education
expression
face
finger
geek
glasses
guy
idea
intelligence
interview
looking
make
male
man
mind
nerd
offer
pensive
people
person
problem
proposition
reason
reasoning
reflective
school
skeptic
solution
solve
think
trust
uncertain
unsure
young