The physicist and the historian discuss the nature of truth as theoretical models of the universe become increasingly difficult to test

So we must ask ourselves: Is this question — whether or not space is finite — even a scientific one? If it’s forever beyond our realm of testing, is it science? Is it metaphysics? Is it even an important question?

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In many ways the ultimate paradigm shift is for us to define what kinds of questions we consider within the domain of physics, and within the domain of science in general.