> No, the claim is that you cannot have context-free universally true premises for every type discussion.

A core part of "rational discussion" (as I understand it) is separating premises from arguments, so that when someone comes to a conclusion you disagree with, you point out whether you disagree with the premises or the argument (or both) and then you can go into more detail to pinpoint where exactly the disagreement comes from.

The statement "Because Jews are possessed by mind-eating demons from Xzdrgs, the Holocaust was justified." is probably both too absurd in its premise and too abhorrent in its conclusion to warrant serious consideration, and yet if someone wanted to engage it in a rational discussion, they could do so, e.g. by stating that mind-eating demons from Xzdrgs don't exist or that assuming they did exist, you couldn't defeat them by killing the host, or any number of other arguments. Those arguments themselves are then subject to counterclaims based in the same principles of rational discussion, and so on.

Now I wonder whether you could turn "absurdist rational discussion" into a game and whether it would be any fun to play.