Hi Bruno, On 8/11/05, Bruno Marchal <[EMAIL PROTECTED]> wrote:
I am having a problem understanding this axiom: > (...) Lob formula (B(Bp->p)->Bp), the main axiom of the modal logic > of self-reference (G) > can be interpreted as showing that some form of honest placebo effect > works! But this is something I am still taking with some grain of salt. > See the book "Forever Undecided" to see Smullyan exploiting the working > of some self-fulfilling beliefs. Suppose p = "it is raining today" B(Bp->p) is true because I believe that if I believe it is raining today it IS raining today, since If I believe it is raining today it is because I have gone outside and seen that it is raining today, or I believe my source of information for that matter. But it doesn't follow from that that I do believe that it is raining today. It happens by the way that I don't believe it is raining today, because I can see a beutiful sun outside. What's wrong? Eric.
