Standard of review

R v Yorston, 2013 ABCA 309 :

[6]               Triers of fact have considerable leeway in assessing the evidence and in drawing inferences from that evidence: R v Biniaris, 2000 SCC 15 (CanLII), 2000 SCC 15, [2000] 1 SCR 381 at paras 24, 37. While appellate courts accord great deference to findings of fact by a trial judge, they will intervene when they are unreasonable: R v Wolbeck, 2010 ABCA 65 (CanLII), 2010 ABCA 65, 474 AR 331 at para 9.