Some A are B. (T) Some A are not non-B.
A) Obversion. (T)
B) Contradictory. (F)
C) Contraposition. (Und.)
D) Contrary. (F)
E) Subcontrary. (Und.)

Question

Quizplus · Accepted Answer

Obversion is the correct choice because it involves changing the quality of the statement while keeping the same subject and predicate terms. In this case, we change "Some A are B" to "Some A are not non-B," which is the opposite or negation of the original statement.

Some a Are B