Operation Statement given It is false that some oysters are not fish. It is false that some oysters are non-fish. It is false that all oysters are non-fish. It is false that all fish are non-oysters. Some fish are not non-oysters.
Some fish are oysters.
It is false that some ficus benjaminas are untempramental houseplants. Therefore, all ficus benjaminas are temperamental houseplants.