Ladies and gentlemen, I am here today to present to you the idea: Superman is Superwoman.
Here are my premises, and the conclusion that rises from these premises.
Superman is a superhero X is Y
Superwoman is a superhero Z is Y
/ Superman is Superwoman / X is Z
Before you start arguing about how this argument is invalid, let’s look into the meaning of validity.
Validity, discussed in class, depends fully on the form; if the form is correct, then the arguement is valid. As you can see from the form that is to the right of the arguement, the arguement is valid.
Now, the question is, is it factually correct?
Since we don’t know whether Superman or Superwoman truly exists, we can’t say for sure if the premises are factually correct. So, whether the arguement is sound or not cannot be proven until we can be sure that Superman/Superwoman exists.
Therefore, nobody can argue that this arguement is flawed, because nobody can prove whether or not superman/woman exists.