Do you have any sources backing that? Last time I checked alcohol dilates blood vessel which actually makes you lose heat more easily (but that's just while you're under the influence)
Core body temp != single point-in-time measurement.
Since when ? Core body temp means exactly what it describes: your internal body temp, you can make it a one time measurement, an average or whatever you want.
> You expect it will measure less heat because your vascular system is dilated and shedding more heat?
I expect that shedding more heat will make your body lose more heat, which will lower your body temperature. I don't even know why it's so controversial in this thread, literally no one is refuting the fact that alcohol increase heat loss.
Especially true in cold weather because your body naturally contracts blood vessels to reduce heat transfer, which alcohol completely cancel.