(1) Their power of judging the effect of evidence is not arbitrary, but to be exercised with discretion and in subordination to the rules of evidence as declared by the court.
(2) They are not bound to find in conformity with the declarations of any number of witnesses which do not produce conviction in their minds against a less number, or against a presumption or other evidence satisfying their minds.
(3) A witness wilfully false in one part of his testimony may be distrusted in others.
(4) The testimony of an accomplice ought to be viewed with distrust and the evidence of the oral admissions of a party with caution.
(5) In civil cases the affirmative of the issue shall be proved, and when the evidence is contradictory the finding shall be according to the preponderance of evidence; that in criminal cases guilt shall be established beyond reasonable doubt.
(6) Evidence is to be estimated not only by its own intrinsic weight, but also according to the evidence which it is in the power of one side to produce and of the other to contradict; and, therefore, if the weaker and less satisfactory evidence is offered when it appears that stronger and more satisfactory evidence was within the power of the party, the evidence offered should be viewed with distrust.