Why would any of those be limits? Sometimes you can't see the next barriar to break down until you clear the current one.
Why wouldn't they be? Sometimes you can break down a barrier and you have no more barriers behind it to break down.
Take modern medicine. We search and search for a cure for cancer, but what if there isn't one? I mean you can't cure having your body dissolved by acid, so why does cancer have to have a cure? Because we can imagine a world with a cure? If that is so then reality has no rules.
I'll admit that there probably is a cure for cancer (at the very least in its early stages), but it makes a good example since most people belive that in the future we will have one without even thinking of the possibility that it just doesn't exist.
Why wouldn't they be? Sometimes you can break down a barrier and you have no more barriers behind it to break down.
Take modern medicine. We search and search for a cure for cancer, but what if there isn't one? I mean you can't cure having your body dissolved by acid, so why does cancer have to have a cure? Because we can imagine a world with a cure? If that is so then reality has no rules.
I'll admit that there probably is a cure for cancer (at the very least in its early stages), but it makes a good example since most people belive that in the future we will have one without even thinking of the possibility that it just doesn't exist.