Teaching and mentalism are very similar, both require drama, showmanship and subtle manipulation of small things.
Mentalism, when performed properly, should leave the audience with the notion that what they've just seen was real
I'm not quite sure I'd agree with you there. If I see something, and I'm then told how you did it, while I'm very impressed that you're psychic or that you can read my body language I still 'know' how you did it and thus there is some form of closure.
If on the other hand I don't have a clue how you're doing it, then, in a perfect world the 'magic' in the original performance lingers for a while. Albeit until I decide that a camera or stage hand was just looking over my shoulder or some such. That said, even then I can't be sure.
A quote from Teller found in Bannachek's psychological subtleties:
Teller's just described the effect for a trick where a audience member has said his favourite flower is a rose, looked under his seat and found a "you will pick a rose" card.
"Now I could tell you that I foresaw that a rose-lover would choose that seat. But I'd be lying. I can't read minds. I can't predict the future.
And yet, you found an envelope under your chair and it told you you'd just chosen a rose.
How did it get there? I'll tell you this much: I put it there an hour ago.
"See? Already you have something to think about on that long drive home."
For me, that's always been the attraction to the really basic or 'naked' mentalism. As few props and as much of a personal touch as possible, trying to create a genuine 'magic moment' between you and the spectator who's just witnessed something completely unexplainable. Pure magic.
Whilst I agree that various claims add something to the performance (though I'm at a loss to put that 'something' into words), I also feel it takes some of the 'magic' away from it.
That said, I know nothing about presenting magic or what gives audiences a bigger and longer lasting "ooooo!" (err... that could have been phrased better).
Again apologies if this is sounding like arrogant ranting. It's more like the musings of an ignorant mentalist trying to work out exactly what he's thinking (I think there's some irony there somewhere) and using this forum as a sounding board.
Once again thank you for all of the feedback.