The Science of Can and Can't

A Physicist's Journey Through the Land of Counterfactuals

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Postscript summary

A theoretical physicist argues that many of science’s most knotty problems could conceivably be resolved, not by focusing on the facts, but by speculating about what can and can’t possibly be true. In this pursuit, she succinctly outlines specific subjects, including the perpetual motion machine and the ‘theory of the universal constructor’, as well as considering how our ideas of quantum mechanics and gravity might be reconciled.

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