I take it from that, that you could not find a single post to back up your allegation.
Withdraw?
Apologise?
I suspect that I will have to go on waiting, as with Billy and Divis Sweeney.
Do I believe in Billy?
To be honest, it is difficult.
Every case is different, but of the two cases in my family any attempt to teach computing and internet posting would have led only to frustration, anger and failure. I tend to agree with the person who posted,
"If you can do this much with a computer, your doctor's diagnosis was undoubtedly incorrect! Congratulations! You don't have Alzheimer's. "
I also looked at his previous posts, and duplicated his first, a rabid rant against England football supporters.
No trace of alzheimers. (Billy was wrong to suggest that poor grammar is an early symptom.)
In his first post here Billy did a neat cut and paste job on a post of mine.
But it was not just a cut and paste. He also editted out a phrase that showed him in a bad light.
I made that post at 7.21 on June 6th. I did not start with just,
"I will miss Billy.", I wrote "I will miss Billy, even though he called me a liar and could not substantiate it."
Not a bad achievement for an elderly Alzheimers patient who has only just learned to turn a computer on!

But IF it is all just a cynical lie, who would do such a thing?
Who would fein a crippling brain disease just to make me look bad?
Hardly likely to be a newcomer to mudcat.
It would have to be a long standing antagonist of mine.
But I can only think of one such.

A couple of weeks ago I pointed out that both Billy and Divis Sweeney mispelt "liar" as "lair"
In my 32 years of teaching I can not remember anyone making that mistake. Can anyone else?
Now this is not proof of co authorship. It is circumstantial at most, and last time I did apologise for even pointing it up.
However, in the light of this thread I feel that it is only fair to put it before people who may have been taken in by this disgusting lie, IF that is what it is.