here's the definition on dumb i'll let you decide
dumb
P.S. if you ask this question on the internet then the answer is probably yes.
guy on the internet: am i dumb?
the internet: yes!
A negative expression to express when you feel you did something wrong or incorrectly. (The opposite of the more positive "Am I smart?")
I tried to do my math homework; here are my answers: Am I dumb?
This makes no sense... Am I dumb?
I can't do this, Am I dumb?