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

Question

Quizplus · Accepted Answer

The statement can be simplified to: "There are some A that are B and there are some A that are not non-B". Using obversion, we can convert the statement into its logically equivalent form: "There are some A that are B and there are some A that are not not-B". This statement is true, as it simply means that there are some A that are B and some A whose non-B status is uncertain.

Some a Are Not Non-B