Seriously, do you not understand the concept? I'd bet very few people would, when asked, say they were in the 50% of the populace that's below median intelligence. So what makes you think you're so smart?
I know I'm intelligent because I got fucking straight A's in school while going out every night, I read 1200 (or so) pages of mostly philosophy, mathematics and history, a week, I passed the Mensa entrance exam (actually it's a really boring club), and I find, in life, that I am able to pick up new concepts faster than my peers. And yet I totally acknowledge that I am likely overstating my own brains.
So, again, what makes you think you're in the top 50%? Top 10%? Whatever portion of the top you believe you're in?