Note 423 — Chapter VIII

Reduction to figure 1 appears to be affected by this supposition, since it makes the contraposition of A and the conversion of E in general invalid. The contraposition of A is involved in the direct reduction of Baroco (Faksoko). The process is, however, in this particular case valid, as the existence of not-M is given by the minor premiss. The conversion of E is involved in the reduction of Cesare, Camestres, and Festino from figure 2; and of Camenes, Fesapo, and Fresison from figure 4. Since, however, one premiss must be affirmative the existence of the middle term is thereby guaranteed, and hence the simple conversion of E in the second figure, and in the major of the fourth becomes valid. Also the conversion of the conclusion resulting from the reduction of Camestres is legitimate, since the original minor term is subject in its premiss. Hence Camenes (and its weakened form) are the only moods whose reduction is rendered illegitimate by the supposition under consideration. This result agrees with that reached in the text.