What Counts as Changing Your Mind Well?

A belief can contain both a factual claim and a personal value. New evidence may challenge the claim without settling the value—and sometimes what looks like a changed belief is really a new standard for accepting evidence.

When should we call a change of mind a genuine revision rather than moving the goalposts? Would it help to say in advance what evidence could change the factual part, while being clear about which priorities remain matters of judgment?