Text: Not an airtight argument (all anti-discrimination laws pick and choose among protected classes), but a cleverly textualist one--and one that seems to have helped convince a majority of the court to strike down the amendment, despite a lack of helpful precedent.
Entailment: There are no helpful precedents in the case law.
Contradiction: The argument was excellent but it failed to convince the majority of the court to disregard the lack of precedent and strike the amendment down.