Make a new argument, or be dismissed

Am I close-minded if I stop entertaining the arguments in favor of slavery? Even though there are no new ones being presented? (And haven't been for hundreds of years.)

I do believe I should keep an open mind about everything. But I’ve already heard all the arguments people make in favor of slavery. I’m not going to waste my time reconsidering the same old arguments as though I haven’t heard and dismissed them all before.

I’ve heard all the arguments in favor of government. Hundreds of times or more. Present a new one, and I’ll honestly consider it. Otherwise, no. It has been weighed, measured, and found deficient. Try again, with something new, or be dismissed.

You don’t need to keep evaluating the same old arguments as though they are new. I don't think that makes you close-minded; it's a better use of your finite time.

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If not, that’s OK.