- Roger Wicker asks whether Facebook can track browsing activity even when a user is logged out of Facebook. Zuckerberg responds that he's not aware and he'll h

- Roger Wicker asks whether Facebook can track browsing activity even when a user is logged out of Facebook. Zuckerberg responds that he's not aware and he'll have his staff follow up, then later admits that cookies exist. They obviously do track this, as stated in their documentation: https://www.facebook.com/help/186325668085084 https://www.facebook.com/help/186325668085084 - John Cornyn asks whether all of a user's data is deleted when their account is deleted. Zuckerberg says, "We should delete all your information." Cornyn: "Should, or do??". Zuckerberg: "We do". - Later on, Cory Gardner reads parts of Facebook's terms of service stating that backup copies of data may persist for some time after an account has been deleted. Zuckerberg pulls the old, "I'm not sure how it works, I'll have my team follow up". He really seems to want to avoid saying outright that 100% of your data is deleted, because it isn't, "log records" (open to broad definition) are only somewhat anonymized: https://www.facebook.com/help/125338004213029 https://www.facebook.com/help/125338004213029 - Gardner also asks whether Zuckerberg thinks users are aware that they are tracked every time they are logged in in another tab and visit a website with a Like button on it. Zuckerberg says, he thinks people are aware, they should be able to infer that from the context we show them about their friends liking the page. - During questioning by Sheldon Whitehouse, Zuckerberg says users can download all data Facebook has about them. This is false. The "download your data" button only gives you data from your direct interaction with Facebook, and definitely does not include the sites they've tracked you on around the Internet. Not sure whether any of these dodges bordering on lies could be prosecuted for lying to Congress, but sure would be interesting to see that tried.