Analytic It is clear that the definition of "logic" or "mathematics" must be sought by trying to give a new definition of the old notion of "analytic" propositions.
Be scrupulously truthful, even if the truth is inconvenient, for it is more inconvenient when you try to conceal it.
Never try to discourage thinking, for you are sure to succeed.
Common sense, however it tries, cannot avoid being surprised from time to time.