Consequentia mirabilis
Γράφει ο Αριστοτέλης στον Προτρεπτικό : « εἰ μὲν φιλοσοφητέον φιλοσοφητέον, καὶ εἰ μὴ φιλοσοφητέον φιλοσοφητέον πάντως ἄρα φιλοσοφητέον » [βλ. επίσης ΕΔΩ ]. Consequentia mirabilis [2'] In a passage of his Protrepticus [ Προτρεπτικός ] mentioned by several ancient authors Aristotle wrote: εἰ μὲν φιλοσοφητέον φιλοσοφητέον, καὶ εἰ μὴ φιλοσοφητέον φιλοσοφητέον πάντως ἄρα φιλοσοφητέον (V. Rose, Aristotelis Fragmenta , 51. Cf. R. Walzer, Aristotelis Dialogorum Fragmenta , p. 22; W. D. Ross, Select Fragments of Aristotle , p. 27) . That is to say, ‘ If we ought to philosophise, then we ought to philosophise; and if we ought not to philosophise, then we ought to philosophise (i.e. in order to justify this view); in any case, therefore, we ought to philosophise ’ [Από το άρθρο του William Kneale: Aristotle and the Consequentia Mirabilis ] .