Supreme Court is not a trier of facts; exceptions.

See - Substantial Compliance Rule In Formalities Of Wills... - The Lawyer's Post

"x x x.

Well-settled is the rule that the Supreme Court is not a trier of facts. When supported by substantial evidence, the findings of fact of the Court of Appeals are conclusive and binding on the parties and are not reviewable by this Court, unless the case falls under any of the following recognized exceptions:

(1) When the conclusion is a finding grounded entirely on speculation, surmises and conjectures;

(2) When the inference made is manifestly mistaken, absurd or impossible;

(3) Where there is a grave abuse of discretion;

(4) When the judgment is based on a misapprehension of facts;

(5) When the findings of fact are conflicting;

(6) When the Court of Appeals, in making its findings, went beyond the issues of the case and the same is contrary to the admissions of both appellant and appellee;

(7) When the findings are contrary to those of the trial court;

(8) When the findings of fact are conclusions without citation of specific evidence on which they are based;

(9) When the facts set forth in the petition as well as in the petitioners’ main and reply briefs are not disputed by the respondents; and

(10) When the findings of fact of the Court of Appeals are premised on the supposed absence of evidence and contradicted by the evidence on record.⁠2 

x x x."

See - 

G.R. No. 145545, June 30, 2008, PAZ SAMANIEGO-CELADA, PETITIONER, VS. LUCIA D. ABENA, RESPONDENT.