more of a question of whether values are stable.
or question if human values are (objective and) independent of humans (as subjects who could develop)
or question if we are brave enough to ask questions if answers could change us.
or (for example) question if it is necessarily good for us to ask questions where answers will give us more freedom.
It seems that if we can ever define the difference between human beliefs and values, we could program a safe Oracle by requiring it to maximise the accuracy of human beliefs on a question, while keeping human values fixed (or very little changing). Plus a whole load of other constraints, as usual, but that might work for a boxed Oracle answering a single question.
This is a reason to suspect it will not be easy to distinguish human beliefs and values ^_^