User:Elliott Fontain
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Across Wikipedia one can find the assertion that analog signals are synonymous with continuous time signals and that digital signals are synonymous with discrete time signals. I've been taught that discrete time is a necessary but insufficient condition to establish that a signal is digital, or equivalently that signals are analog, even at discrete interval, until their dependent variables are quantized. I'm no engineer or mathematician so I'm not going to contest the point, I'm just throwing that out there.