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It might be thought that we need to bring in an independent time variable at this point, but an insight of fundamental importance appears to be that the idea of process is more basic than the notion of time.  A time variable is actually a reference to a ''clock'', that is, a canonical or a convenient process that is established or accepted as a standard of measurement, but in essence no different than any other process.  This raises the question of how different subsystems in a more global process can be brought into comparison, and what it means for one process to serve the function of a local standard for others.  But these inquiries only wrap up puzzles in further riddles, and are obviously too involved to be handled at our current level of approximation.

It might be thought that an independent time variable needs to be brought in at this point, but it is an insight of fundamental importance that the idea of process is logically prior to the notion of time.  A time variable is a reference to a ''clock'' — a canonical, conventional process that is accepted or established as a standard of measurement, but in essence no different than any other process.  This raises the question of how different subsystems in a more global process can be brought into comparison, and what it means for one process to serve the function of a local standard for others.  But these inquiries only wrap up puzzles in further riddles, and are obviously too involved to be handled at our current level of approximation.

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