First Principles Fractions

Elon Musk: I think it's also important to reason from first principles, rather than by analogy. So, the normal way that we conduct our lives as we reason by analogy. We're doing this because it's like something else that was done, or it's like what other people are doing; slight iterations on a theme. It's kind of mentally easier to reason by analogy rather than from first principles. First principles is kind of a physics way of looking at the world. What that really means is you boil things dow