This is completely the wrong way to go about finding our absolute denial macros. It is clearly not the advice we would offer to any other group.
We would not tell others to make up things they think are obviously true and see if any others in the group are irrational. If anything that's a recipe for cementing groupthink.
We would advise others to go outside the group, examine the evidence as directly as possible, and to study, basic logic, science, and current scientific knowledge.
Well, what if it is too hard?
Imagine that you knew for a fact, that for any person in a community whose beliefs you were poised to challenge, it would feel too dangerous, too boring, too uncomfortable or awkward to actually go outside and closely observe the territory which they have every reason (with the sole exception of your assurance) to model as utterly uninteresting. And yet imagine (it's a bit of a stretch, I know, but please play along for the sake of this exercise) that you care for them enough to try and help them discover truth, or maybe use them to improve your map by observing their struggle. How would you go about making them face the contradiction?
This article is a deliberate meta-troll. To be successful I need your trolling cooperation. Now hear me out.
In The Strangest Thing An AI Could Tell You Eliezer talks about asognostics, who have one of their arm paralyzed, and what's most interesting are in absolute denial of this - in spite of overwhelming evidence that their arm is paralyzed they will just come with new and new rationalizations proving it's not.
Doesn't it sound like someone else we know? Yes, religious people! In spite of heaps of empirical evidence against existence of their particular flavour of the supernatural, internal inconsistency of their beliefs, and perfectly plausible alternative explanations being well known, something between 90% and 98% of humans believe in the supernatural world, and is in a state of absolute denial not too dissimilar to one of asognostics. Perhaps as many as billions of people in history have even been willing to die for their absurd beliefs.
We are mostly atheists here - we happen not to share this particular delusion. But please consider an outside view for a moment - how likely is it that unlike almost everyone else we don't have any other such delusions, for which we're in absolute denial of truth in spite of mounting heaps of evidence?
If the delusion is of the kind that all of us share it, we won't be able to find it without building an AI. We might have some of those - it's not too unlikely as we're a small and self-selected group.
What I want you to do is try to trigger absolute denial macro in your fellow rationalists! Is there anything that you consider proven beyond any possibility of doubt by both empirical evidence and pure logic, and yet saying it triggers automatic stream of rationalizations in other people? Yes, I pretty much ask you to troll, but it's a good kind of trolling, and I cannot think of any other way to find our delusions.