This is not a unified theory in the standard sense of physics.

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Roger Penrose, for example, has long been on record as arguing that it is quantum mechanics, not general relativity, that needs to be modified in order to successfully develop a grand unified theory.

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He would spend the next three decades, ending with some equations scribbled while on his deathbed in 1955, stubbornly criticizing what he regarded as the incompleteness of quantum mechanics while attempting to subsume it into a unified field theory.

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One woman who has dated fifty-eight men since her divorce, a few years ago, told me that she maintains a chart, both to keep the men straight and to try to discern patterns as though there might be a unified-field theory of why men are dogs.

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Einstein's theory of relativity unified these and created a four-dimensional space that is an analogue to our three-dimensional space, except that the "distance" between two points need not be positive.

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This could be achieved by finding which one is right and which one is wrong, by finding that both string theory and loop quantum gravity are wrong and a third theory is right, or by finding that the two theories can be unified.

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