I would have introduced him to the concept of mathematical logic and given him the tools to define a notion of problem equivalence and prove that the other problems were equivalent to the ones he'd already done! I bet if you didn't tell a 3rd grader that this was something normally reserved for advanced logic courses at university, they could do it just fine!
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timeasmymeasure
no subject
Date: 2016-10-13 08:34 pm (UTC)