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by antipurist·4y ago·view on hn ↗
Those scenarios can be better tested through simulations. E.g. to pass a driving exam you are presented with a road situation, and given only a few seconds to respond — this completely eliminates the possibility of looking things up on the internet. A similar approach can be used for other disciplines.

> separate wheat from chaff

Wheat can demonstrate/use the knowledge, chaff can't. Why does it matter whether the knowledge is internal or external, assuming results are the same?

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Because you do not know if the results are the same before making the decision to go with person A or person B. There are time costs in figuring out if someone can do something or is capable of learning how to do something, so test(s) of various kinds are used as a proxy.