the act, state, of deluding or being deluded; a false opinion or belief, especially one that may be a symptom of madness

misconception, misbelief

(an act of) criminal dishonesty; a person who pretends to be qualified, to have authority or to want to be kind, but who is or does not

trickery, deception

a statement or conclusion that does not (seem to) have any connection to what was said or written before

fallacy