Confucious said that real knowledge is knowing the extent of one's ignorance.Aristotle and Socrates said the same thing.Is it a skill that can be taught or learned? It probably can, if you have enough of a stake riding on the outcome...
The multiverse is not a theory, but a prediction of certain theories.
Laughing is good for you if you don't kill yourself.
I'm interested in the idea of something being art because someone says it is.