Part of the point of discussion on a discussion forum is hopefully to be able to convince others or to be convinced by their arguments?

Indeed. So when people give you the reasons why something happened, over and over again, why do you never listen to them? Joe's been telling you the score for two years now. I've been trying to apply logic to that you state as your arguments. You don't listen, you just ignore them and post again without varying your original argument.

I'll say freely that I'm not convinced by your arguments, but that isn't the problem - the problem is that every post of mine on this subject has been in answer to a question you asked or a point you raised, and the same for every post of Joe's, and other people too. You simply don't respond to any of those posts - you just ignore them. For this reason, I would say that you're unwilling to have a discussion.

Saying that you are unable to have a discussion implies some mental defect in you, which would be incorrect. I'll credit you with the basic mental equipment. But in this case, failure to participate in a discussion means that you have chosen not to do so. This reasoning takes us further into your way of thinking. The possibilities are: you're simply a troll and your posts are just designed to cause trouble, which I don't think is the case; you're ignoring those posts because you think you're being victimised, which is possible but I can assure you is not the case; or you don't have time to reply, which given all the other posts you manage, I can't believe is true; or you're ignoring those posts because replying to them would reveal (possibly to yourself) the obvious falsity of your reasoning.

For would you really seriously consider that I would have been first attracted to and contributed for so long to any forum where my once fellow poster (Joe Offer) judged what he would allow me to post?

When the quote you give is a reference to the fact that you were spamming non-sequitur criticism across the forum, then the fact that you think this is some way helping your defence speaks volumes.

Graham.