I'm actually trying to unpack what I meant. I had one of those rare, sober bursts of the kind of trippy insight that usually occurs to people when stoned. :) I

I'm actually trying to unpack what I meant. I had one of those rare, sober bursts of the kind of trippy insight that usually occurs to people when stoned. :) I'm guessing what I mean here is that chalkboards serve as a shared resource, on which multiple humans can perform operations together, or with larger problems addressed in smaller chunks in tandem. It's not "parallel computing" per se, but it's an analog analogue.