Rounding a very large number up to infinity isn't entirely irrational, but once you get organized enough, you just might be able to find time - or a system - to bring that very big number down to an entirely tractable value.
Yes, this is a species of "careful shopping" but my point isn't to say that shopping carefully is useless - rather, that it's a drastic error to mistake this useful (and surprisingly satisfying) *tactic* for a *strategy* that will truly alter the system.
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