An intellectually pretentious person; a pseudointellectual.
pseudo-city code
A poseur; one who is fake.
A pseudonym; a false name used for online anonymity.
Other than what is apparent; spurious; sham.
Insincere.
Yes, expressing noncommittal agreement or consent.
Yes; of course.
You're welcome; polite response to being thanked.
Without doubt, certainly.
Physically secure and certain, non-failing, reliable.
Certain to act or be a specified way.
Certain in one's knowledge or belief.