Such as is sufficient to establish the proposition In question, beyond hesitation, ambiguity, or reasonable doubt, in an unprejudiced mind. Evans v. Rugee, 57 Wis. G23, 10 N. W. 49; French v. Day, 89 Me. 441, 30 Atl. 909; Ward v. Waterman, 85 Cal. 4SS, 24 Pac. 930; Winston v. Burnell. 44 Kan. 307, 24 Pac. 477, 21 Am. St. Rep. 289.