Something other than the wall could grant your wish to believe that the wall grants wishes, and then you would believe a falsehood. (Unless the wall grants wishes, too, but ignored yours in particular for some reason. But that’s a Gettier case.)
p(wishgranted|~wallgrants) is negligible, I think. Still, I suppose you could just recite the entire Litany of Tarski.
What is p(wish is answered by Murphy the mad god of irony)?
Something other than the wall could grant your wish to believe that the wall grants wishes, and then you would believe a falsehood. (Unless the wall grants wishes, too, but ignored yours in particular for some reason. But that’s a Gettier case.)
p(wishgranted|~wallgrants) is negligible, I think. Still, I suppose you could just recite the entire Litany of Tarski.
What is p(wish is answered by Murphy the mad god of irony)?