Argument from Ignorance ad ignorantiam (also known as: appeal to ignorance, appeal to mystery [form of], black swan fallacy [form of], toupee fallacy [form of]) Description: The assumption of a conclusion or fact based primarily on lack of evidence to the contrary. Usually best described by, “absence of evidence is not evidence of absence.” Logical Forms: X is true because you cannot prove that X is false. X is false because you cannot prove that X is true. Example #1: Although we have proven that the moon is not made of spare ribs, we have not proven that its core cannot be filled with them;
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