Why is it so terrifying to admit that all races are not created equal? Intelligence, athletic ability, whatever. There are clear and obvious differences between the races yet some people refuse to admit it. Why?
Most people recognize the differences, but you are the one refusing to admit that external factors can influence many of those differences. It's biologically obvious that midgets aren't going to take over basketball anytime soon, but there are no known biological differences in their learning capacities.
Nobody is born knowing the answers to IQ test questions. If you really think that Mike Tyson's early life was as conductive to learning as that of Bill Cosby, then it's possible that you are so afraid of appearing politically correct that you would rather deny common sense.
How about if either of them had been raised by dogs :
[ame=http://www.youtube.com/watch?v=qyqbnDjId7g]Dog Girl - YouTube[/ame]
When Tyson went to prison he had to live under a structured environment without many distractions, so he spent a lot of time reading. After his release he got a Che Guevara tattoo and started using a bigger vocabulary. This shows his brain had the ability to learn more.
Now you would probably say that only an idiot would get a Che Guevara tattoo, but then I would point out that the biggest American Che fans seem to be higher IQ whites with low crime rates.