I'm not proficient in Philosophy but I think that we just select to draw the line at some point and accept that perceived things are such and such. AFAIK there

I'm not proficient in Philosophy but I think that we just select to draw the line at some point and accept that perceived things are such and such. AFAIK there is no way to even logically assert that other people exist (solipsism if i recall right) but it would make no sense to go that way at least according to our biological substratum. It makes sense to just assume that such dead-end philosophic avenues are not the way to go. As long as none of them proves itself more correct than the more 'realistic/pragmatic' alternatives we can go about just fine.