DISAMBIGUATION: FALSIFICATION
Falsification: systematic attempt to determine falsehood.
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Unfalsifiable = not possible to falsify
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Falsifiable = possible to falsify
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Falsify = present: try to make falsified
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Falsify = future: may succeed in falsifying
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Falsified = successfully falsified.
So yes, 3/4 are confusing.
Ideas are produced by Free Association
Explanation, is Produced by Justification
Due Diligence is produced by falsificationism
Truthfulness is produced by adversarialism