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@ShadSterling
Right. So yes, bits are an abstraction too in the schema of my OP. And at any level of abstraction, I’d want students to be comfortable:

(1) learning how to work within the abstraction (binary arithmetic, in this case),

(2) moving down a level, even if it means learning the unfamiliar (logic gates or EE or whatever), and

(3) moving up a level, even if it means giving up the familiar (because it’s now hidden).

Specific change, but there’s an underlying mindset there.