Proving god with logic?

[Modler]

Exactly! And that is just what makes syllogisms so unreliable. When you look at the two premises isolated from one another, they are absolutely true, but they are using two different understandings of the word "mammal", and the conclusion of a syllogism is completely blind to such linguistic inaccuracies.

That is the dumbest thing I've heard yet! If you use a the same term for two values then you have broken the form of the syllogism.

Off course you have.
But the question is; will anyone notice the fault in the premises?
The syllogism itself won't tell if you've made such a mistake - its conclusion is blind to eventual mistakes in the premises.

And that's just the point I was trying to make; syllogisms can't always be trusted, because they may produce false conclusions due to faults in the premises that may not be obvious.