iStock/Thinkstock(MENLO PARK, Calif.) — Facebook boss Mark Zuckerberg is firing back against accusations that fake stories posted on the site could have influenced the presidential election. Zuckerberg insists they didn’t, but he’s vowing to take action against the false stories.

A study by BuzzFeed showed top left-wing sites published false or misleading stories about 19 percent of the time, while top right-wing sites published them about 38 percent of the time. Critics are saying those viral hoaxes could have influenced this year’s election.

For Facebook’s part, Zuckerberg claims 99 percent of what users see is authentic, but he’s taking the criticism seriously, saying he wants the site to have improved ability to push accurate information to the tops of our Facebook feeds. But how far should Facebook go? Watch the video for more:

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