Knowing all that I know now, would I pursue the project all over again? Would I invest the money and energy all over again to get as far as I’ve come in solving this problem? If the answer is yes, don’t quit. Keep at it. Feeling impatient with progress and deflated by process is fine, so long as you still have conviction. But if your answer is “Hell, no! If I could go back to the day before I got into this mess, I would head in a totally different direction,” then ask yourself why you are still trying. Are the sunk costs keeping you from quitting? Are you still going only because of how much
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