AAAAAAAAGGGGGHHHHHHHHH!!!!!
Wrote back & forth with the prof some more. He basically says "there's no dispute because I'm right", so I'm adding it to my list of innapropriate behavior to take to the department chair (found out I have to take it there before I appeal to the dean). Although I desperately wanted to, I refrained from telling him how utterly ridiculous that is - there's just no point in talking to him any further. He did say, though, that I could still earn a C in the class if I stayed, so I guess it makes sense if I do. I can suffer through this for one more month. Not that I'm not taking this all the way to the top, but I'll stay and earn my credit. On the bright side, I have all the pressure I need now to kick ass on the last assignment and hand it in early.
Today I'm not sad, just livid, and I want to make him pay. Fucking asshole.
Update: oddly, another student wrote back from my question as to if anyone else is having trouble with him to tell me that he finds the class easy & he's doing well. Ack! What on earth am I doing wrong that this kid with major logic troubles (if his forum answers indicate anything) is finding this "easy"? I have relied on my 3.9 GPA for reassurance that if I'm having trouble, it must be worse for the average students. This just makes me feel dumb.