The habit of a natural person is admissible to show the person's conduct on a particular occasion.

Dunn v. Perrin, 570 F.2d 21, 24 (1st Cir. 1978) ("Authorities differ on the advisability of equating proof beyond a reasonable doubt with establishment of guilt to a moral certainty. See United States v. Magnano, supra, 543 F.2d at 437; United States v. Byrd, 352 F.2d 570, 575 (2d Cir. 1956)."; court,...Some courts have approved and some courts have criticized jury instructions saying that proof beyond a reasonable doubt is proof of guilt to a moral certainty.

Camfield v. City of Oklahoma City, 248 F.3d 1214, 1232 (10th Cir. 2001) (upholding trial court's exclusion of witnesses' testimony about Sgt. High's seizure announcement of child pornography videos upon walking into a video rental store where the conduct was not a semi-automatic act and could not serve as...Habit is a regular response to a specific situation.

United States v. Khalil, 279 F.3d 358, 364 (6th Cir. 2002) (upholding trial court's admission of Agent Moran's testimony as non-hearsay evidence because "the challenged testimony was elicited in an effort to explain....If a statement is assertive -- that is, if the declarant's statement does assert that some matter is true -- the statement is nevertheless non-hearsay if the statement is offered to prove that some matter other than the asserted matter is true.