Another stimulating Q&A set from Quora.
This item requires an account on the Quora site to read, and if you don't know Quora this could be a good introduction. Apologies if you don't have one (and don't want to sign up for yet another social media site). It's worthwhile, in my opinion, to follow the more well-thought-out questions. Quora has some good question curators. I suspect the idea site Quora will, as it matures, curate topical questions and answers increasingly well.