What kind of a medical test can reveal whether a woman is carrying a regular baby vs. a demonic alpaca?

I'm not sure what gave you the idea that it could be a *demonic* alpaca. There's no reason to think that homeless man we ran into outside of the 7-11 ACTUALLY knows witchcraft. If you just would have given him a whole dollar like I told you to none of this would even be coming into question. But no, you didn't want to unfold the paper plane you'd made out of it earlier, at lunch. You're so weird!