Your story, however amusing, is somewhat clouding the point of the CB discussion on the node in question. Who will make the best engineer in your story? Probably number four. Who will get the best mark on the assignment? That isn't clear as we don't know which course this is for (e.g. theoretical or experimental), but we can be pretty confident that it won't be number four.

I'm not sure about morals, but personally I don't feel it is useful or helpful to give a student the answers directly. On the other hand, I'm not sure how many professionals are literally paid to know the answer as part of their job. Know how to find the answer? Sure. Know how to ask the right questions? Even more important. But knowing all the answers isn't part of many job descriptions. To take that to an extreme that person would have to have memorised all applicable manuals in the field, as well as not needing to ask a peer for assistance. I don't want someone that confident working for me as I'd always have to check that they were in fact correct and not just overconfident (which is much more common IME).

And for the record, as a former long-time engineering student I can attest to the fact that questions were very often mis-numbered! ;-)

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I'd like to be able to assign to an luser

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