What possible rationale could there be for Pageant of the Peacock?
I appreciate the original concern of the OP, and all I can do is sympathize. It's a difficult question and I hope you find the best position for yourself. But what I'm really interested in is the logic, if any, behind this ability.
I have read this thread from start to finish, and I think I understand most of the arguments for and against. I started from the position that OBVIOUSLY Pageant of the Peacock simply allows a bard to PRETEND to have skills (knowledge) that they don't. (FLite effectively made this argument early on.) What could possibly justify a combination of acting (dancing) and bluffing leading to actual skill or knowledge?
I keep thinking of a character in popular culture who does this, but I can't quite put my finger on it. This character is so charismatic and such a good BS artist that he is able to actually effect technical knowledge/skill that he really shouldn't have. AND co-incidentally, this character has a studious companion that actually has technical knowledge and is often chagrined at the lucky guesses he makes. I wish I could remember who this is.
Is this what Pageant of the Peacock is supposed to be? That a bard can so effectively pretend to be an expert in something that she actually intuits knowledge out-of-the-blue?
I find the word "masterpiece" suggestive and I notice that the effects of bardic masterpieces are said to be "supernatural". In Real Life, masterpieces are works of art that are often considered to be divinely inspired--products of a supernatural insight known as "genius". Perhaps the bard is able to access knowledge supernaturally, by virtue of her artistic virtuosity and sensitivity.
In real life, we sometimes speak of actors "channelling" the subjects that they portray. It is as if an actor is able to tap into the soul of the character they are portraying to such a degree that they seem to have an uncanny access to their thoughts and emotional make-up.
Maybe in the fantasy world of Pathfinder, this could be more than metaphor. Maybe a masterpiece of bardic impersonation actually confers the skills and knowledge of the subject being impersonated. A bard pretending to be a scholar of religion could actually thereby gain religious knowledge, for example.
Or again, it could be just a comedic thing, where the bard makes some lucky guesses in trying to appear to be something he is not.
Well, that's the best I have... I won't say that I agree with this logic. Just a thought experiment to see if there COULD be a basis for it...
How Perform(Dance) could fit in... No idea...