Good exists - a Catholic comments

[Thumpalumpacus]

Yeah, it's an assumption, although it is an assumption made by observing reality. The available evidence suggests giraffes don't come from nowhere. So it's an informed assumption.

Right, but you wrote "never", which implies certain knowledge and not an assumption. You don't know that some god didn't zap a giraffe into existence. I agree with you that it seems absolutely stupid and contrary to all human experience.

But that doesn't make it knowledge. All science is tentative.