We can’t directly go counterfactual on necessary facts—only on observations that provide evidence regarding necessary facts.
Yes we can. Omega could offer you to control worlds where Q is actually odd.
I want to answer “No he can’t. Not if I am in a world in which Q is actually even. Not if we are talking about the same arithmetic formula Q in each case.” But I’m coming to realize that we may not even be talking the same language. For example, I don’t really understand what is meant by “Omega could offer you to control worlds where ___”. Are you suggesting that Omega could make the offer, though he might not have to deliver anything should such worlds not exist?
I notice that Shokwave … is now saying that the value of Q is different in the counterfactual worlds
Link? The value of Q is uncertain, and this holds in considering either possible observation.
Are you suggesting that Omega could make the offer, though he might not have to deliver anything should such worlds not exist?
Yes. The offer would be, to enact a given property in all possible worlds of specified event. If there are no possible worlds in that event, this requirement is met by doing nothing.
I want to answer “No he can’t. Not if I am in a world in which Q is actually even. Not if we are talking about the same arithmetic formula Q in each case.” But I’m coming to realize that we may not even be talking the same language. For example, I don’t really understand what is meant by “Omega could offer you to control worlds where ___”. Are you suggesting that Omega could make the offer, though he might not have to deliver anything should such worlds not exist?
I was referring to this
Yes. The offer would be, to enact a given property in all possible worlds of specified event. If there are no possible worlds in that event, this requirement is met by doing nothing.