Thanks for the reply, coderitr.
Discrimination
"is not the definition of discrimination to treat someone differently because of their disability?"
Right. What happened was I failed to provide an explanation of what I meant, so apologies for that.

Finding a definition of discrimination like "treatment of a person based on the group, class, or category to which that person belongs rather than on individual merit" is easy. The problem with a "straightforward" definition is that it tends to portray discrimination as a negative thing when that's not automatically the case. Explanation:
I did recruiting for a couple of years, until a few years ago. Out of the 100s of interviews I conducted, the one I'll always remember was "the deaf candidate". He
hadn't ticked "Yes" on the application form for "Do you have any special requirements?", but at interview it became clear after a very few minutes that he'd overestimated his ability to handle the situation. So, what I had to do was write the questions down, have him read them & write his responses, and then read his responses. Longest interview e-v-e-r!

Did I treat the guy "differently"? ; absolutely. Did I discriminate against him, or any of the other candidates? IMO (& as per company policy) all I did was ensure that no candidate was treated "less favourably", i.e. I gave them all sufficient opportunity to answer the questions. I simply levelled the playing field, if you like. Hope that explains my POV.
Exemplary
Err, OK.

Once upon a time I argued with A N Other member for days/pages because A N Other member asserted that "sexuality" meant the same as "sexual orientation". Since there's a fairly major soccer game on telly this PM, let's say we agree to disagree.
Deafness
"I find it difficult to make the connection between a hearing deficiency and the inablity to use proper spelling, grammar, sentence structure and verb conjugation in written communication."
I've quoted this again because of an afterthought. Namely, is it possible for academic progress to be affected by deafness,
particularly if it's picked up later rather than sooner? Maybe CCM can shed some light on some point -- of course that would be up to him, but I'd be interested to know.
rgds,
bomb