How to ascertain the truth in court?

The means, sanctioned by the Rules of Court, of ascertaining in a judicial proceeding the truth respecting a matter of fact. Evidence also refers to the medium used to prove the existence or non-existence of a fact in issue.

Evidence is the means of ascertaining in a judicial proceeding the truth respecting a matter of fact, sanctioned by the Rules of Court. The purpose of introducing documentary evidence is to ascertain the truthfulness of a matter at issue, which can be the entire content or a specific provision/term in the document. (G.R. No. 190846)