depression, personality disorders, people who have difficulties with bipolar or even high functioning asperger's syndrome, for example. >> why is the diagnosis so important? so you know you have it. >> and also to make sure you can eliminate what you don't have, right? >> right. sorry, what? >> well, you know, it could be your thyroid. could be any number of things. >> yeah, mm. >> okay, say--say you have a sore toe. >> i don't, though. >> no, but say you did have a sore toe. >> i don't have one. that's one. that's one. >> so now you could have a sore toe because someone stomped on your foot or your shoes are too tight, you stepped on a nail, you got an ingrown toenail. heck, you could have toe cancer. >> i got toe cancer? >> maybe there's something wrong with your vision. maybe your hearing is problematic. >> it could be a mood disorder. >> maybe it's an anxiety disorder. >> it could be a thyroid issue. >> because mom changed the fabric softener and all of a sudden, the kid was squirming in his seat and somebody said, "that kid must have adhd." my gosh, you know? not everything walking in the d