ABSTRACT
People who write about methodology often forget that it is a matter of strategy, not of morals. There are neither good nor bad methods, but only methods that are more or less effective under particular circumstances in reaching objectives on the way to a distant goal. For this reason a general, in science as in warfare, is lost if his thinking is rigid. He must be a master of timing; what has served him well in the past may get in his way now. He must have more than one weapon in his armory and know when to change one for another.
