Description: "Fesapo", one of the syllogisms of Aristotelian logic. No ph is
ps , all ps is ch , and ps exist, therefore some ch
is not ph . In Aristotelian notation, EAO-4: PeM and MaS therefore
SoP. (Contributed by David A. Wheeler, 28-Aug-2016) Reduce
dependencies on axioms. (Revised by BJ, 16-Sep-2022)