Logic is relevant for everyday life. There is much truth to the old saying that “life is just one problem after another.” That is why problem solving is one of life is serious preoccupations. Reasoning is the essential ingredient in problem solving. When confronted with a problem, those of us who are rational reason from what we already know, or have good reason to believe, or can find out, to new beliefs useful in solving that problem. The trick, of course, is to reason well in everyday life, whether dealing with personal problems or those of a social or bureaucratic nature. ...