Tony Perkins said Sunday that a federal judge's ruling declaring California's gay marriage ban unconstitutional ignored “a lot of the social science.”

Perkins heads the social conservative group Family Research Council (FRC), which is opposed to gay rights.

He appeared Sunday on CBS' Face the Nation to discuss the ruling opposite David Boies, who is a part of the legal team that challenged the constitutionality of Proposition 8.

“He [Chief U.S. District Judge Vaughn Walker] ignored a lot of the social science in his opinion,” Perkins said.

Boies disagreed, and called such evidence “junk science.”

“Well, it's easy to sit around and debate and throw around opinions – appeal to people's fear and prejudice, cite studies that either don't exist or don't say what you say they do.”

“But when they come into court and they have to support those opinions and they have to defend those opinions under oath and cross-examination, those opinions just melt away. And that's what happened here. There simply wasn't any evidence. There weren't any of those studies. There weren't any empirical studies. That's just made up. That's junk science.”

“And it's easy to say that on television. But [the] witness stand is a lonely place to lie. And when you come into court, you can't do that. And that's what we proved. We put fear and prejudice on trial, and fear and prejudice lost.

But Perkins insisted that “anybody with half-a-brain” could see that social policy changes, such as no-fault divorce, have had an impact on marriage. “And as a result have impacted the well being of children,” he added.

Perkins ended by saying that conservatives “hope sanity will reign when [the ruling] makes it to the Supreme Court.”

Appearing on Fox News Sunday, Ted Olson, who litigated the case along with Boies, said he's “reasonably confident” the Supreme Court will side with his clients, two gay couples who have been denied the right to marry because of the gay marriage ban.