"If event E had occurred, someone would know of documentary evidence for E; someone does not know of documentary evidence for E; therefore, E did not occur." The conditional in this model of arguments from silence is probabalistic if its consequent is not deducible from the antecedent, relevant conditions, and laws. In interesting cases arguments from silence are rarely rationally, and never logically, conclusive. Specific instances of the argument must be evaluated individually, their persuasiveness depending mainly on the likelihood of (...) documents being available in a given type of case. (shrink)