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closed system or closed mind?

Methinks I once heard Sean Carroll argue that physics is a closed system; hence no need for God.  And then at another time I heard him mention that the inflationary universe violates the law conservation.  Is there a contradiction here?  If the universe is all that closed, then wouldn't the law of conservation be inviolable?  And if the law of conservation is dispensable, then doesn't the claim that the universe is closed become dispensable as well?

I am not trying to argue for theism based on the violability of the law of conservation: the latter is neither sufficient nor necessary for theism.  I am instead just trying to point out that Sean Carroll is arguing ad hoc, so that he fails to notice that different claims he has made conflict with each other.

I would like to know what he thinks of the scientists who years ago proposed the steady-state theory.

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