619.10  Evidence under denial.
  Under a denial of an allegation, no evidence shall be introduced which does not tend to negative some fact the party making the controverted allegation is bound to prove.
[R60, §2944; C73, §2704; C97, §3615; C24, 27, 31, 35, 39, §11196; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §619.10]