All we know about the world teaches us that the effects of A and B are always different-in some decimal place-for any A and B. Thus asking "are the effects different?" is foolish.
John TukeyTo be able to say that "if we change our point of view in the following way ... things are simpler" is always a gain.
John TukeyAn approximate answer to the right problem is worth a good deal more than an exact answer to an approximate problem.
John Tukey