Not always. One part of Derren Brown's act involves getting people to say things that aren't true at all -- playing with suggestibility in groups and cohesiven

Not always. One part of Derren Brown's act involves getting people to say things that aren't true at all -- playing with suggestibility in groups and cohesiveness. Like, he'll do a quickfire guessing thing, going through audience members, guessing, "did I guess right?" thing, ramping up the speed, and he knows for sure people will say yes when they want to say no. He's maniacally clever.