There may be no independent physical substance constituting our reality.
, quantum theory – the physical theory that describes the universe at the smallest scales – almost certainly shows this worldview to be false. Instead, Rovelli argues we should adopt a “relational” worldview.During the scientific revolution, the English physics pioneer Isaac Newton and his German counterpart Gottfried Leibniz disagreed on the nature of space and time.
According to Rovelli’s relational interpretation, these properties are all there is to the object: there is no underlying individual substance that “has” the properties.Consider the well-known quantum puzzle of Schrödinger’s cat. We put a cat in a box with some lethal agent triggered by a quantum process and close the lid.
But according to the relational interpretation, the state of any system is always in relation to some other system. So the quantum process in the box might have an indefinite outcome in relationSo it is perfectly reasonable for the cat to be neither dead nor alive for us, and at the same time to be definitely dead or alive itself. One fact of the matter is real for us, and one fact of the matter is real for the cat.
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