No, because the road to “common sense” often has a lot of “nonsense” paving the road. You have to experience a little (and sometimes a LOT !) failure until something becomes common sense. Accept your “failures” as part of the learning process. As a work friend said once, if you aren’t making some mistakes, you aren’t doing the job! (while standing on an I-beam support 150 feet in the air).
It’s a cartoon, that’s all, a joke why pontificate in this manner? Or do you just like the sound of your own prejudices
My grandmother was fond of the expression, “Common sense is very rare.”
I’ve always thought of common sense as something you either have or you don’t; I don’t consider it to be something you can learn, either from experience or by making mistakes. In this case I don’t think the kid would have benefited from using common sense; he just needs to study a little more in order to understand his math better.
Nicely said, Magic Grandad.