Joe Biden gives his guarantee

In August, 2012, Joe Biden visited a diner in Virginia and got into a conversation with patrons about Social Security:

"Hey, by the way, let's talk about Social Security," Biden said after a diner at The Coffee Break Cafe in Stuart, VA expressed his relief that the Obama campaign wasn't talking about changing the popular entitlement program.

"Number one, I guarantee you, flat guarantee you, there will be no changes in Social Security," Biden said, per a pool report. "I flat guarantee you."

Uhhhh....Joe?

Chained CPI?

Joe? Anything to say about that?