Deductive Argument Form
Consider the following argument:
1. Billy is a Thai or he’s a Filipino.
2. Billy is not a Thai.
----------------------------------------------------
3. He’s a Filipino
In this argument, if premises 1 and 2 are both
true, then the conclusion must be true also.
But are both premises true? We have no way
of knowing since we don’t know any thong
about Billy and consequently don’t know
whether he is or is not a Filipino