Just today I read something interesting about our brains.
we suppose to literally live in a hallucination. Our brains predict things as a defense mechanism. If sensors readings (senses) doesn't match those predictions the brain start to freak out.
here is the article in czech:
https://www.osel.cz/14111-tanec-v-zrcadlovem-sale-manual-k-demontazi-vaseho-ja.html