I'm curious to know if their stance and logic extends to taking government money, registering as disabled for any kind of benefit, and so forth. If it isn't a disability, don't take the money.
If you can't get aid for it, I don't think it's classified a disability. What if they get rid of it later? I registered for adhd in my old school and I don't even mention it anymore since I didn't need the extra time for exams.
