People who are ignorant as in they never encounter the situation
and dont know anything bout it, and when you tell and explain to
the person what is it about, to let him/her know more, (not to show
him/her you're knowledgeable ot whatever, just to let him/her know
the fact), he/she argues with you 24/7 and think he/she is right
and tell you you're wrong. 
After clarification with others and they know they're wrong, you
look at them, they diam diam. (but still want to argue and claim
they're right)
Very dulan with this person. Happened many many many many
times.
