When to Sell, When Not to Sell

I think deep knowledge are two words that andrew really emphasized over and over during our discussions. In the world i remember from forty years ago, there wasn't much change to day changes every day. Generalizations and superficial information are not sufficient. And if you want to an be a superior investor, all this is about superiority. The whole question comes down to the difference between what you own, or what you're buying, and what you have to pay for it.