In her dissent, Justice Owen argues that "well-established common-law principles regarding appellate review" require us to recognize an implied finding that Doe is not mature as though this were an omitted element of Doe's claim. This purported "common-law" principle, and most of the cases cited to support it, are based upon Texas Rule of Civil Procedure 299, which provides that, when one or more elements of a claim or defense have been found, "omitted unrequested elements, when supported by evidence, will be supplied by presumption in support of the judgment." Tex. R. Civ. P. 299. Thus, the argument goes, if there is some evidence supporting the trial court's failure to find that the minor is mature, the judgment must be affirmed.
Justice Owen acknowledges that Rule 299 conflicts with section 33.003 and does not apply............
Plain English please.