These deductions are all particular, whether affirmative (see Darapti, Disamis, and Datisi) or privative (see Felapton, Ferison, and Bocardo).
The second incomplete deduction is Felapton, whose universal premises are privative and affirmative: (49)
To prove the potentiality of inferential necessity, Aristotle converts the minor premise "every S is R" into "some R is S," so that Felapton (3.2) is reduced to the complete deduction Ferio (1.4) of the first figure:
The reduction to the complete deducibility of Ferio proves the incomplete deducibility of Felapton, namely its potential inferential necessity.
(3) Festino (in the second figure), Felapton, and Ferison (in the third figure) have a potential inferential necessity, reduced to the inferential necessity of the complete Ferio (in the first figure).
(33) A universal deduction requires that all its premises be universal, but this does not mean that all deductions with universal premises are universal, as we shall see with Darapti and Felapton in the third figure.