This is the second part of a two part series. Here we focus exclusively upon "It from Qubit" (2002) by David Deutsch as found here: https://www.daviddeutsch.org.uk/wp-co... I read and comment upon the paper, unpacking its significance for physics, epistemology (i.e: the search for good explanations), metaphysics (ultimate reality beyond what science tells us) and compare this vision of reality to alternatives (for example as presented in the "It from Bit" thesis by Wheeler. The Simulator Hypothesis makes an appearance as does some of the mechanics behind quantum computation itself. But, overall, this is a work stranding physics and philosophy namely: what the former can tell us about having an informed explanation of the latter. To that end both Einstein and Popper are quoted by Deutsch herein.

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