[The Urban Sombrero]

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"Conspiracist fool" would be suggesting that it is foolish to always be touting conspiracy-type ideas. It is mistaken to apply that to a verse which, by plain implication and meaning, is suggestive of this: "Thou fool"... of reprobate mind, of such a low standing as to be outside of God's grace, a person of utter contempt. This is far from my meaning. Again, a petty literalism troubles you.