Whats wrong here?

yes indeed the first girl is right, in the original it stated "what's the error? its impossible" then you looked at all the letters and then it said at the end " Did you know that 80% of UCSD students could not find the error above? " and the thing that was wrong with it was the title said "what's the error? this is impossible, and at the end said 80% couldn't find the error which only means that 20% could, the error is that it states that its impossible but in reality it is not becuase 20% were able to find the error. i had to do this in a cl of mine about a year ago, i couldn't either haha