Any Nihilists here?

[Angrboda]

The list of things in the set of the good is debatable.  I can only say that if some person I'm talking to puts "grinding kittens faces against a metal file" in there.... then we just aren't talking about the same thing when we use the terms?

Not presently. So far the set of things objectively good or bad is zero.

A change in a subjective fact, in metaethical parlance, would be some change in your own opinion or attitude.  Not a change in the facts of an object or act in question.  In a subjective moral system, objective facts can change all they want and It doesn't matter, because your conclusion isn't derived from anything about the x in question.  

Which besides being false is not particularly relevant.

In an objective moral system, your opinion or attitude could change about some given x, but absent a change in facts of that thing x it will remain whatever it was before you had your change of heart.

I believe I already said that. Are you going to get around to demonstrating objective morals or are you going to tap dance some more?