Given the categorical proposition "Some drugs are not effective medicines." If the quality but not the quantity is changed, the resulting proposition is:
A) All drugs are not effective medicines.
B) No drugs are not effective medicines.
C) All drugs are effective medicines.
D) No drugs are effective medicines.
E) Some drugs are effective medicines.

Question

Quizplus · Accepted Answer

If we change the quality, we negate the predicate, and the proposition becomes "Some drugs are effective medicines."

Given the Categorical Proposition "Some Drugs Are Not Effective Medicines