Phil 109 4/10

What is the converse of "Some mammals are lions"?

• Some mammals are not non-lions.

• All lions are mammals.

• Some lions are mammals.

• No mammal is a lion.

True or false: The converse of "Some mammals are lions" is logically equivalent.

• True

• False

What is the obverse of "Some mammals are lions"?

• Some mammals are non-lions.

• Some mammals are not non-lions.

• Some mammals are not lions.

• Some non-lions are non-mammals.

Which of the following is logically equivalent to "All tuna are fish"

• All fish are tuna.

• No fish is a non-tuna.

• All non-tuna are non-fish.

• All non-fish are non-tuna.