Incidentally, since it seems relevant to the OP, let me pass on a tip about ‘discussing’ Sylvia Brown and other ‘psychics’ wiht true believers.
If you try to disagree and criticise, you will get nowhere. It just becomes a pintless heat-butting contest between their beliefs and your ‘facts’. People are naturally very protective of their beliefs, and tend strongly to resent anyone trying to ‘take away’ or harm their belief system.
The key is to agree and to praise. And the to dangle the carrot of ‘inside information’. The following might be rather idealised, but this is how to massage the conversation.
Believer: ‘I think Sylvia Brown is amazing, she knows so much and she’s so accurate and she helps so many people’.
*You: ‘Oh yes, I agree, I’ve seen her to. She’s really good at it. All those in the know say she’s one of the best when it comes to cold reading. You can tell she’s been doing it a long time. She’s really convincing. I bet it takes ages to learn to do it so well’.
*
Believer: ‘Yeah, I saw her once and… excuse me, what did you say? Cold what?’
You: ‘I was just saying, she’s really really good at cold reading. Definitely one of the best. Really convincing. Her act almost had me fooled for a while! All credit to her, she really knows what she’s doing’.
Believer: ‘What do you mean? ‘Act’? What are you taking about? You don’t think she’s for real?’.
You: ‘No no no, she is for real. Of course. That’s what I’m saying. She’s really good and skilled at cold reading’.
Believer: ‘I don’t understand. What’s cold reading?’
*You: ‘Cold reading? You haven’t heard? That’s what she’s doing. That’s how it’s done. How she does the whole ‘psychic’ thing. That’s why she’s so convincing. Because she’s really good. I admire her technique.’
*
Believer: ‘I don’t get it. You saying she’s not psychic?’
You: ‘Well, I’m saying she looks psychic. And she does it very well. Like I said, she had me well and truly fooled for a while, so all credit to her. And even now when I know how she does it, I still say she’s one of the best at cold reading.’
Believer: ‘There you go again with this ‘cold reading’. What the hell are you talking about?’
*You: ‘Look it up. It’s all over the internet. Just google on ‘cold reading’, and you’ll find it all explained. How you can talk and look like you’re psychic. Anyone can learn it. But like anything else, it takes time to learn how to be really good. And Sylvia is pretty good at it. It’s amazing when you know how it’s done.’
*
Or something along those lines. Now, as it happens, Sylvia Brown - whatever other merits she may have - is not actually very good at cold reading, and her technique is appallingly poor. But that’s beside the point.
I know the OP said the friend was not primarily interested in the ‘fortune-telling’ aspect of Sylkia’s work, but the above is a pretty good generalised template for handling any discussion of anyone who uses cold reading techniques on TV. It gets a lot further than the ‘yes it is’ ‘no it isn’t’ type of discussion. Professional psychis know how to handle attacks and criticism. Praise is far harder to handle.