Regarding my criticisms of Buffett's theories last week, I'd like to add a few more words. If an answer is based on truth, then logically speaking, it can almost be said that there is no angle from which to attack it. For example: if you ask me to attack Einstein's theory of relativity, Gauss's normal distribution, Newton's law of universal gravitation... and so on, I have no way to logically dismantle those theories. Therefore, one of the criteria for judging whether something is truth is actually whether it can be logically attacked and defeated.