The correct standard-form translation of "Something is a fish only if it has gills" is "_____."
A) Anything that is a fish does not have gills
B) All fish have gills
C) No fish has gills
D) If anything is a fish, then it does not have gills

Question

Quizplus · Accepted Answer

The statement "Something is a fish only if it has gills" implies that having gills is a necessary condition for being a fish. Therefore, the correct translation is that all fish must have gills, which is option B.

The Correct Standard-Form Translation of "Something Is a Fish Only