when do u know that u r really stupid ?

but when the sales woman asks you " if 1 kilo of tomato = 2.5 l.e , then how much for a kilo and a half ? and you mind goes blank :D "

when do u know that u r really stupid ? the answer when u solve the hardest logical puzzle in the history within 2 hours while watching a movie , and beat chess master , and develop an algorithm that output jokes in dramatic scenes and actually works and people think u are hilarious but when the sales woman asks you ” if 1 kilo of tomato = 2.5 l.e , then how much for a kilo and a half ? and you mind goes blank :D ”