Abstract

In De alimentorum facultatibus, Book I, Ch. 1, Galen begins his discussion of the powers of foodstuffs by a rough sketch of the opinions of earlier physicians on this subject. He says that according to some of them these powers are only known on the basis of experience , according to others on the basis of a combination of experience and reasoning , whereas a third group gave priority of importance to reasoning . Galen proceeds to say that there is considerable disagreement between these physicians on the topic in question and that, consequently, an unbiased testing of their opinions is necessary; this testing should operate by means of argumentation . Now there are two different starting-points for argumentation, i.e. perception and ‘distinct thinking’ . Then the text printed by Helmreich runs as follows: κα μς ναγκαν στιν ἢ θατρ τοτων ἢ μφοτροις χρσασθαι πρς τν το προκειμνου σκμματος ερεσιν: ‘It is necessary for us, too, to use either one of these or both of them in order to find the question under discussion.’