Description: "Bocardo", one of the syllogisms of Aristotelian logic. Some ph is
not ps , and all ph is ch , therefore some ch is not
ps . Instance of disamis . In Aristotelian notation, OAO-3: MoP
and MaS therefore SoP. For example, "Some cats have no tails", "All cats
are mammals", therefore "Some mammals have no tails". (Contributed by David A. Wheeler, 28-Aug-2016)