NS,
Except I think the argument is imaginary, rather than secret, so no matter what anybody says, he can just make up some bullshit in order to claim that it doesn't refute the (non-existent) argument
I’m sure you’re right about that, but I was giving hm the benefit of the doubt.
Three options here:
1. He has no argument, but pretends that he has.
2. He has an argument, but he knows it's hopeless so won’t post it because he knows it’ll be falsified.
3. He has an argument that he thinks is sound, but for some reason wants to keep it secret nonetheless.
As he consistently refuses not only to answer questions but refuses too to tell us
why he won’t answer questions, we’ll likely never know which it is though – which is why he has nothing of interest or value to say.