You may recall how Supreme Court Justice Ruth Bader Ginsburg appeared to be dozing during President Obama's State of the Union address this year.

There is now a perfectly acceptable explanation for this: Ginsburg admitted she wasn't exactly sober during the address, The Blaze reported.

At George Washington University Thursday night, Ginsburg said, "The audience for the most part is awake, because they're bobbing up and down, and we sit there, stone-faced, sober judges. But we're not, at least I wasn't, 100% sober."

The 81-year-old said she had vowed to stick to sparkling water, but couldn't stay away from "very fine California wine" at a dinner before the State of the Union.

"Because before we went to the State of the Union, Justice Kennedy brought in … it was an Opus something or other, very fine California wine, and I vowed this year, just sparkling water, stay away from the wine, but in the end, the dinner was so delicious, it needed wine," Ginsburg said. "So I got a call when I came home from one of my granddaughters and she said, 'Bubbe, you were sleeping at the State of the Union!'"

She also admitted she had a history of falling asleep during the address, and it was her former colleague David Souter who used to keep her up.

"David Souter, when he was on the court, he was on one side and he had an acute sense of when I was about to [nod off]. Now I have Justice Kennedy on one side, Justice Breyer, and they're sort of timid about it," she said.