I think the part after your slash is a different case than them having correct facts and reasoning, just with different values. In your after-slash case they are "wrong". You're looking at how to have them accept facts and correct their reasoning.

The first part is interesting, but ultimately, if their conclusions were based only on facts and reasoning, their conclusions would only be limited to the area of facts, "is" statements. They would not be able to derive ought/should statements. (If you believe in Hume's Guillotine.)