if i alert someone of the possibility of earning either 0 or 100 dollars at a coinflip by saying "the average payout is 50 dollars," while ive said something true, ive also said something misleading. a reasonable person might say, "0, but you said i could earn 50!" and would you expect them to be mollified by me saying, "no no no, its actually only the average is 50. i was clear about this up front." its like a student turning in their math homework and they didnt simplify the expression at the end, complaining about the teacher insisting you have to do all the work to earn full credit.