I do not get this classification. The answer is fully known to the person who tells you, just has emotional valence such that they'd prefer not answering. Or yo

I do not get this classification. The answer is fully known to the person who tells you, just has emotional valence such that they'd prefer not answering. Or you will prefer to not having heard the answer. Most of the time it is also possible to deduce it partially. (but careful about that) Unless it is something very unusual.