He claimed to be a virgin again in court. It seemed hard to believe from President of Keg City, but who knows. Something like half of Harvard's graduating class graduates as virgins, it's not impossible to believe similar for Yale. He did say "sometimes I had too many beers", so it's not like he's denying heavy drinking, though he said he always got sick before he'd ever pass out/black out. Also seems a bit unlikely, but again maybe not. His yearbook has evidence that he was known to get sick from drinking, which doesn't necessarily mean blacking out. Personally, I've never been sick from drinking because I always black out first. (Except for one time that I had a glass of milk with breakfast following a night of drinking.) It's pretty much a genetic thing afaik.
Maybe he exaggerated the impact of the alleged-party-goers' testimony, but is it not true that no one at the time has corroborated Ford's story? I think it's certainly possible that Kavanaugh committed the sexual assault, but there's virtually no evidence beyond the name of Mike Judge and the fact that they both drank. She cannot provide details of when and where the assault happened, so there's no real way to Kavanaugh to defend himself.
EDIT: Apparently he got sloppy in the second half of his testimony. Just ctrl-F'd his transcript and he initially said that none of the specific witnesses supported Ford's statement OR that they denied remembering the party, correctly, then he started to incorrectly say the witnesses denied Ford's statement. By the end he got it right again.