An argument having a single premise
Testing _______________ ______________ or testing an argument having a single premise.
Next, let us see how we can use the traditional square of opposition to test _____________ _______________ for validity. Here is an example:
All Swiss watches are true works of art. Therefore, it is false that no Swiss watches are true works of art.
To evaluate this argument, we begin, as usual, by assuming the premise is true. Since the premise is an A proposition, by the contrary relation the corresponding E proposition is false. But this is exactly what the conclusion says, so the argument is valid.immediate inference