A madman always believes that it's everyone else who's mad.
If you want to test yourself to see if you're nuts, two of the first signs of madness are watching or listening to the BBC, and reading The Guardian. The next sign is having any hairs growing on the palms of your hands.
I'm sorry to disagree with you again, but I think that watching the BBC and reading the Guardian are essential. If you don't know how important opinion formers are thinking, you will very very soon get out of touch.
The danger of living in an echo chamber which just reflects your own views back to you is that you can get sucked into a spiral of mistaken ideas.
I find it essential to operate as a sceptic about absolutely everything. That includes my own beliefs. I regularly examine them carefully. It is very easy to ignore our own biases and just look for sources which reflect back to us our own thinking. I think we need to be aware of that and to be ready to change what we think.
If science had not been designed to do exactly that, where would we be?
He thought he would be protected against plague, by keeping unpleasant smells out of his nose.