The following excerpt is from Wilkins v. American Export Isbrandtsen Lines, Inc., 446 F.2d 480 (2nd Cir. 1971):
The operation of a presumption is often described, for this is a rule of law as to which the jury must be instructed. But the cases do not clearly define the ingredients out of which a presumption is created.9 It is generally understood that in law for a specified fact to be presumptive evidence of another it must be one which in common experience leads naturally and logically to that other. Tot v. United States, 319 U.S. 463, 467, 63 S.Ct. 1241, 87 L.Ed. 1519 (1943). Cf. McFarland v. American Sugar Refining Co., 241 U.S. 79, 86, 36 S.Ct. 498, 60 L.Ed. 899 (1916).
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