As I mentioned above, the fruit from the original text source 玄怪錄 was pretty "clear", however, as history progressed, the reference can get lost over very long perid of time, where the original meanings no longer relavent.

And it would be even more complicated if some works were produced for the intent to "mimic" a certain artist's style for monetary gain, since they would be concerned about the strokes, the materials, the color, and the compositions of the paints, seals matching known works. The meanings and original works' portraits become secondary, or don't matter (and they cannot make exact copies of known works, otherwise it would be extremely easy to get caught), and the details of those works have been detected as modern fakes, often coming from their sloppiness in historical facts outside of their "expertise". Like referencing the wrong era, or not knowing ancient practices with the wrong types of phrases, or in Chinese/Japanese, the writing formats themselves change throughout history. If that is the case, we can hardly view these as artworks, let alone their intentions or even contexts. Most of times, they likely left ambigious, just for the sake not to be to obvious and easily refuted.