The recent Radio 4 Head to Head programme reviewed the 1976 debate between de Bono (who I have previously cited on this blog) and A.J. Ayer, about democracy.
A.J. Ayer is famous for logical positivism in which he identifies empirical data as being essential for knowledge and debate. On the other hand, de Bono is famous for his understanding of creative thinking, introducing a whole wardrobe of techniques. I think that both should be part of Interactive Democracy.