“Possible” is a subtle word that means different things in different contexts. For example, if I say “it is possible that Angelica attended the concert last Saturday,” that (probably) means possible relative to my own knowledge, and is not intended to be a claim about whether or not you possess knowledge that would rule it out.
If someone says “I can(not) imagine it, therefore it’s (not) possible”, I think that is valid IF they mean “possible relative to my understanding”, i.e. “I can(not) think of an obstacle that I don’t see any way to overcome”.
(Note that “I cannot think of a way of doing it that I believe would work” is a weaker claim, and should not be regarded as proof that the thing is impossible even just relative to your own knowledge.)
If that is what they mean, then I think the way to move forward is for the person who imagines it impossible to point out an obstacle that seems insurmountable to them, and then the person who imagines it possible to explain how they imagine solving it, and repeat.
If someone is trying to claim that their (in)ability to imagine something means that the laws of the universe (dis)allow it, then I think the person imagining it is impossible had better be able to point out a specific conflict between the proposal and known law, and the person imagining it is possible had better be able to draw a blueprint describing the thing’s composition and write down the equations governing its function. Otherwise I call bullshit. (Yes, I’m aware I am calling bullshit on a number of philosophers, here.)
“Possible” is a subtle word that means different things in different contexts. For example, if I say “it is possible that Angelica attended the concert last Saturday,” that (probably) means possible relative to my own knowledge, and is not intended to be a claim about whether or not you possess knowledge that would rule it out.
If someone says “I can(not) imagine it, therefore it’s (not) possible”, I think that is valid IF they mean “possible relative to my understanding”, i.e. “I can(not) think of an obstacle that I don’t see any way to overcome”.
(Note that “I cannot think of a way of doing it that I believe would work” is a weaker claim, and should not be regarded as proof that the thing is impossible even just relative to your own knowledge.)
If that is what they mean, then I think the way to move forward is for the person who imagines it impossible to point out an obstacle that seems insurmountable to them, and then the person who imagines it possible to explain how they imagine solving it, and repeat.
If someone is trying to claim that their (in)ability to imagine something means that the laws of the universe (dis)allow it, then I think the person imagining it is impossible had better be able to point out a specific conflict between the proposal and known law, and the person imagining it is possible had better be able to draw a blueprint describing the thing’s composition and write down the equations governing its function. Otherwise I call bullshit. (Yes, I’m aware I am calling bullshit on a number of philosophers, here.)