:: Any philosophical statement that is a base part of any philosophical theory is an axiom. It's a basic part of predicate logic.
:: Try reading up on your logic.
I think it's about time to stuff your hair splitting method of arguing, Farinata. Language and the art of communication has no purpose if you are constantly going to dissect and parse it to your advantage in these debates.
I take the meaning of the word "axiom" as most people do;
1. A principle, universally received.
2. A self-evident truth or proposition.
Barry's statement was and still is widely controversial and entirely unprovable yet he spoke it as if it were self-evident. There are far-reaching ramifications if morality really is only a social construct. There are intelligent arguments that can be made to the contrary.
All your vitriolic nonsense aside, why don't you just let Barry tell us if he spoke truth in that sentence. Reading his response to my post he comes off, once again, as well past characterizng his philosophy as belief. No, he comes pretty close to resolute dogma there.