If we cannot answer the annoying question of why there is something rather than nothing, perhaps we can at least answer why there is only something rather than everything. Perhaps existence is the default.
Does that imply that a constructor is an approximate specification of a combination of operators (what's a substrate?), or is it the continuous limit of a series of discrete operators, or something else? (What does it mean to perform a transformation imperfectly?)
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Does having multiple outputs for an input mean that tasks are not deterministic or that they are sets of multiple functions mapping from the same set of parameters?
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I think tasks are deterministic specifications, because everything possible happens. "Which single outcome will happen" ("to us") is not deterministic, but there's no such thing in reality. But they are not all one to one, like logically reversible computations.
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A constructor is an abstract object to which physical objects can instantiate approximations. A substrate is a physical system that can undergo transformations. The notion of convergence upon an accuracy depends on the subsidiary theory. I think convergence on a reliability...
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So constructor theory is a theory about the languages that DD uses to describe reality?
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E.g. If a process destroys the functionality of a device, that disqualifies the device from being a constructor for it, so the transformation was performed imperfectly (the explanation for it wouldn't apply at all times like laws of physics do).
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