It's obvious dyslexia has nothing to do with feces; he said this to show that something considered negative in one society (like flinging poo at people) might be positive in another.
Since dyslexia tends to lead to mostly negative results in this society, it's generally considered a disability. If most people were dyslexic, the few who were not would probably be considered disabled--but since most people are not dyslexic and dyslexia produces significant and unusual difficulties for those who are, it fits the generally accepted definition of "disability."
If dyslexia puts him at a disadvantage or prevents/makes difficult his ability to lead a full, normal life, it is a disability. End of story.Originally Posted by dictionary.com
Jonnyboy's point was that it's only a disability because your son lives in a society where the skills it impairs are considered vital and necessary on a daily basis. If the skills which dyslexia impairs were not valued highly by this society, it would not be a disability. See?
I read the link you provided. So yes, there are some benefits to having dyslexia, but that doesn't invalidate the obvious negative effects. So dyslexia is both a gift and a disability in that it allows one to do certain things better than others, but also impairs ability in common and very important tasks such as reading and writing.
In this way it's similar to, say, Savant syndrome. It improves certain aspects of cognition significantly, which makes it a gift, but it also impairs others, often to the point of causing a lot of distress and requiring special conditions in order for the person to lead a full, normal life--which makes it also a disability.