The comparison doesn't necessarily have to be fair, it only needs to accurately discern the fittest. A cat, for example, won't even notice that an IQ test is presented before it, but that doesn't mean that we have to make adjustments, that the conclusion is incorrect.

Good point.

But CDT is too stubborn to do that, and a re-educated CDT is not a CDT anymore, it's half-way towards becoming a TDT.

Perhaps. Although it's not clear to me why CDT is allowed to notice that its mirror image does whatever it does, but not that its perfect copy does whatever it does.

And what about the "simulation uncertainty" argument? Is it valid or there's a mistake somewhere?