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Originally Posted by jmg
No that's not what I am saying at all. If Z cannot be accomplished, then, other options for Z should be explored. Z cannot say X is invalid, because X in my scenario isn't the action we must take, but that there is need for action.
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Saying it can't be done has nothing to do with saying X is invalid.
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I trust experts to be experts at what they do.
If someone is an expert at farming and says we need more water for their crops, but the engineer says there is no way to transport enough water to keep the crops alive, the inability to make it possible doesn't change the fact that the crops need to be watered. The solution, then, is for the engineer to build or invent the aqueduct.
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Build an aqueduct to extract what water? Engineers can't made water from nothing. Focused on the cart and ignoring the horse that pulls it?