OK Stephen,
[quote author=“StephenLawrence”]When the tap is running I do not have the power to make the tap not be running.
Can we agree on that?
No, you have the power to make the tap not run, by deciding to do so. You had the power to as well, but decided not to use it.
Additionally, the tap itself might not have been running, for one of a million other reasons. The pipe could have been broken, the water could have run out, something could have gotten stuck in the pipe, etc., etc. So the tap itself might not have been running.
(The two cases, of the power you had, and the power the world had, are on all fours with respect to the water not running. It might not have been running because of you, or because of the world).
[quote author=“StephenLawrence”]This is not the same as saying that the tap could not have been dry at the time.
Can we agree on that?
Yes, to say that the tap could not have been dry is to say it was necessarily running, i.e. that it was running in all possible worlds. And that is clearly false.
Unless by “could not have been dry” you mean “might not have been dry” ... and clearly it might not have been dry, in that it was actually wet.
[quote author=“StephenLawrence”]When I desire a cup of tea I do not have the power to not be desiring a Cup of tea.
I think we disagree on this? What I’m trying to find out, is why you think we have this power.
This is not the same as saying I could not have been desiring a cup of coffee instead, for instance.
If we can agree on this in the case of the running tap, can we agree in the case of my desires? If not why not?
When you desire a cup of tea, you have the power not to desire the cup of tea, in this sense: it is possible for you not to have desired the cup of tea. Had the world been slightly different, had your genetic makeup been slightly different, you would not have desired the cup of tea.
Consider the logical space of possible worlds. In one of those worlds Stephen had a bad experience with tea when he was a child and so does not now desire tea. So it is possible for Stephen not to desire tea.
Nota bene: this is precisely the same analysis of possibility we give in cases that have nothing to do with beliefs and desires.
Let me show you, taking a case that has nothing to do with beliefs and desires. Mount St. Helen’s exploded in 1980. Did it “have the power” not to have exploded in 1980? Of course. Had the world been slightly different, had the mountain been slightly different, it might have exploded at some other time, or not at all.
Take the space of possible worlds. In one of those worlds, the magma chamber under Mount St. Helen’s was smaller than in the actual world. In another, there was stronger stone above the chamber. In another, there was weaker stone, and it erupted in 1970. In another, it erupted in 1990. Etc. There are an infinity of possibilities here for when it is possible that Mount St. Helen’s erupted, just as there are an infinity of ways that Stephen might have believed and desired, depending on his genetic makeup and lived experience.
[quote author=“StephenLawrence”]I’m not sure what your involvement is with the site but I think it is excellent and am glad to have found it.
I’m one of the Moderators here ... I have a background in philosophy which helps out in these sorts of cases ...
Glad you enjoy the site. Stick around!