Freedom

Is there a philosophical similarity between what one can't do because it's morally wrong, what one can't do because it is contrary to one's own aims, and what one can't do because the laws of physics prevent it? Does philosophy have something to say about these various uses of the same word that we find in several languages?

Comments

To me it seems that the use of the word "can't" and its meaning is the same in all three settings (moral, prudential and physical). "Can't" means there's a contradiction in saying that you do the thing you are said not to be able to do. But the contradiction does not appear without the addition of the "laws" or principles of ethics, or the statement of what one wants, or the laws of physics. There is one exception to this principle. "Can't" in logic and logic-derived fields asserts a contradiction without any body of auxiliary propositions. 'I can't lift 1000kg' means that given the facts of my strength and some facts of physics, there is a contradiction in saying that I lift 1000kg.

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