If there was no such thing as a free lunch then we would all be living in the stone age. Every advancement is based on some kind of efficiency. Yes, those achievements come at a cost. So there may be a relative trade-off but the loss of generality from a purely imaginary (unattainable ultimate general goal) to a practical efficiency is only a loss of excessive fantasizing. I appreciate fantasy and any plan or any revaluation is a form of applied fantasizing, but the cost of trading an unattainable goal for an attainable goal is just like a free lunch. Except that daydreaming is easier than working on a feasible project. But there is the sense of exhilaration of getting nearer to a practical goal.
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