On Tue, Oct 22, 2013 at 03:21:48AM +0200, Platonist Guitar Cowboy wrote:
> On Mon, Oct 21, 2013 at 4:15 PM, Bruno Marchal <marc...@ulb.ac.be> wrote:
> >
> > [](p <-> ~[]p) -> [](p <-> ~[]f)   Gödel fixed point
> >
> > [](p <=> [] ¬p) <=> [](p<=> []⊥)
> >
> >
> Yes, that's the kind of thing I think we're talking about.

Talk about hazards of doing things by email. I was going to ask what a
bare [] means, then when I opened up the editor (which supports
unicode), I see that the original sentence was []⊥  ([]f) !!!!


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Prof Russell Standish                  Phone 0425 253119 (mobile)
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