Why? That’s not a lie.
Simple. I have no verification about your IQ and if I call you a liar, I am right 99.9998467663% of the time. Pretty good odds, I’d say. And, on the non objective side of things, I know from experience with persons beyond gifted, that it is almost an article of faith that they do not quote a number like you have. So, I put you in the crackpot braggart bucket for that fact alone and then, of course there are the odds.