This is true, but one could use some other terminology rather than abuse the word "truth". Aumann is giving ammunition to every continental philosopher who argues that truth is relative or arbitrary, then tries to bring that into public policy.

I lose respect for Aumann for saying this. I have respect for Anders Sandberg, who in the past practiced some neo-paganism, with religious trappings, but when asked about it would explain (IIRC) that he was tricking his mind into behaving.