Kitap 1
7
It is not understood by most persons that the proper use of inferences and hypotheses and interrogations, and logical forms generally, has any relation to the duties of life. In every matter of action the question is, how a wise and good man may come honestly and consistently out of it. We must admit, therefore, either that the wise man will not engage in difficult problems or that, if he does, he will not think it worth his care to deal with them thoroughly; or if we allow neither of these alternatives, it is necessary to confess that some examination ought to be made of those points on which the solution of these problems chiefly depends. For what is reasoning? To lay down true positions, to reject false ones, and to suspend the judgment in doubtful ones. Is it enough, then, to have learned merely this? It is enough, say you. Is it enough, then, for him who would not commit any mistake in the use of money, merely to have heard that we are to receive the good pieces, and to reject the bad? This is not enough. What must be added besides? That skill which tries and distinguishes what pieces are good, what bad. Therefore, in reasoning too, the definition just given is not enough; but it is necessary that we should be able to prove and distinguish between the true and the false and the doubtful. This is clear.
