> Mostly because it not being true is an existential horror no one wants to truly confront.
we can't prove, in this mathematics sense, that other people are conscious just as we can't prove that the sun will rise again tomorrow, or that my food will nourish me instead of killing me, or that everything is still there when you're not looking. for questions of this type we normally content ourselves with empirical evidence instead. and the empirical evidence for the consciousness of other humans (and, taking it further, other animals) for me would be the facts (1) that i am conscious, and that (2) i am a human like other humans: same anatomy, same behaviors, same story. indeed, empirically, it'd be absurd to think that i'd be so profoundly different from other humans in this particular aspect.
i guess what i'm saying is for me the real existential horror is the problem of induction.