California, United States of America
The following excerpt is from Michael U. v. Jamie B., 218 Cal.Rptr. 39, 39 Cal.3d 787, 705 P.2d 362 (Cal. 1985):
"The testimony of a single witness, even the party himself, may be sufficient" to constitute substantial evidence. (Id., 248, p. 4240.) The rationale for this rule is that the trial court, as the trier of facts, is in the best position to assess the credibility of the witnesses. " 'There are many factors aiding in a reasonable conclusion which are presented to the trier of facts in the first instance and not available to one going over the cold record. There is what might be called the "feel" of the case. This embraces a consideration of the witnesses, the manner in which they testify and their general attitude in the courtroom.' (Cummings v. Kendall (1940) 41 Cal.App.2d 549, 555, [107 P.2d 282].)" (Id., 246, p. 4239.)
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