Posted: Feb 10, 2018 2:16 pm
by Thommo
Assuming that there is or is not a fact of a subjective feeling is the difference here.

It's quite possible that a sophisticated enough brain scan (or at a less formal level observation of behaviours like people saying they are happy) is enough to allow other people to verify whether or not someone is happy, for example.

If a fact can be verified, then it certainly can be an objective fact. If it can't be verified then you're down to a philosophical commitment, and in truth neither can be definitely shown.