Does it exist. If yes, do we know what it is? What are the criteria for determining absolute truth?
Since truth is “the real state of things” we have to first agree that reality is more than perception and opinion. If so, then there can be an absolute truth. BUt that doesn’t mean we can, since we preceive reality through different filters, agree on what that absolute truth is.
Proceeding from the belief that there are absolute standards that define reality, we basically have to believe that there is an ultimate authority for setting these standards. That authority is either God or Chance.