LEGAL PRINCIPLE: APPELLATE PRACTICE – Interference with Findings of Fact – Strict Limitations Apply
PRINCIPLE STATEMENT
There are very strict limitations on the Court of Appeal's power to set aside or reverse the trial judge's decision on issues of fact; when the decision is based mainly and substantially on the judge's assessment of the quality and credibility of witnesses who testified, a Court of Appeal must, in order to reverse, not merely entertain doubts whether the decision is right, but be convinced that it is wrong.
RATIO DECIDENDI (SOURCE)
"There are very strict limitations on the power of the Court of Appeal to set aside or reverse the decision of the trial Judge on issues of fact... [W]hen, as here, the decision of the trial Judge is based mainly and substantially on his assessment of the quality and credibility of witnesses who testified before him, a Court of Appeal 'must in order to reverse, not merely entertain doubts whether the decision below is right, but be convinced that it is wrong'."
EXPLANATION / SCOPE
Appellate deference to trial court fact-finding is particularly strict when findings rest on credibility assessment. The standard: appellate courts cannot reverse merely because they doubt the findings or would have decided differently. They must be convinced (not merely suspicious or doubtful) that the findings are wrong (not merely questionable). This high threshold reflects: trial judges see witnesses testify, observe demeanor, assess credibility firsthand, and weigh conflicting testimony—advantages appellate courts lack. Appellate review of cold record cannot replicate this experience. “Mainly and substantially based on credibility” means the decision’s foundation is witness credibility assessment, not merely legal interpretation or documentary evidence. When credibility is central, appellate courts show maximum deference. This differs from: legal error review (no deference), or findings not based on credibility (moderate deference). The principle ensures trial court credibility determinations stand unless demonstrably wrong, not merely debatable. Appellate dissatisfaction or alternative view doesn’t justify interference—only conviction of error does.