The plain man is familiar with blindness and deafness and knows from his everyday experience that the look of things is influenced by his senses but it never occurs to him to regard the whole world as the creation of his senses.
Without renouncing the support of physics it is possible for the physiology...
It evolved from my experience in the fifties growing up during the McCarthy...
I have a theory that the secret of marital happiness is simple: drink in different pubs to your other half.