Granted, moral truths do not exist in the same *way* as the mundane facts of experience.
They are on a different level; they have a higher status. They are more durable.
I’m *more certain* that torturing human babies is evil than I am about most facts of my experience. Most of the facts I’ve known I've forgotten. Moral knowledge seems to have more “sticking power” in memory than knowledge of mundane facts.