Le 16-mars-06, à 23:46, [EMAIL PROTECTED] a écrit :
> is it ? we might be able to ground meaning in causal interactions, > for instance, but can we ground causal interactions in the > timeless world of maths ? I think Hal Finney just gave a nice answer through the notion of block universe. I do think physics, in great part, does try (at least) to ground causal interactions in the timeless world of maths. "Causality" is a very hard and fuzzy notion. It has a very large range of applications from physics to human responsability. It makes no sense to take it as primitive. In logic notion of causality can be axiomatized by some modal correction of material implication: like B(p -> q), i.e. p implies q in all possible universes. Then we can say roughly that there are as many causality notion than there are modal logics. Bruno http://iridia.ulb.ac.be/~marchal/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to everything-list@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/everything-list -~----------~----~----~----~------~----~------~--~---
