I'm beginning to think you're as thick as he is.
"Testosterone is a hormone that males produce in far greater quantity than females. It begins production while the individual is still in the womb, and effects brain development. Testosterone levels tend to peak in the early twenties, and by middle age drop off dramatically. "
Is it reasonable to conclude that the author truly meant to say that testosterone is wholly responsible for brain development, that it causes it? Of course not. What he meant to say was that it influences brain development, but that isn't what he said. I merely thought it was funny because it was such a delightfully embarassing spot to make such a flub. I knew without looking that the author was male. ;)
You, on the other hand, understand language, but for some inexplicable reason feel like you must defend the honor of this goof. Lighten up, buddy.
At least I got a post from you without a smiley. Progress.