"If anyone is going to ask for a real-world example of someone who does not know how a light switch works, I can't provide one off the top of my head, but I'd suggest looking at this, which is even more dreadful."
Thanks RobinZ,
The full quote is
"Everything is vague to a degree you do not realize till you have tried to make it precise, and everything precise is so remote from everything that we normally think, that you cannot for a moment suppose that is what we really mean when we say what we think."
I find this paper to be a good resource to think about this subject: https://motherjones.com/files/emotional_dog_and_rational_tail.pdf