Facebook Inc. Chief Executive Mark Zuckerberg sat for another five-hour session at Congress Wednesday, this time in front of the House Energy and Commerce Committee. And this time, his interlocutors sounded more savvy regarding Facebook and the data collection practices that have both lawmakers and some users up in arms.

Zuckerberg’s trial on Tuesday was largely seen as the CEO deflecting “softballs” from Congress members who seemed to know little more about Facebook and recent controversies than the man in the street. His grilling on Wednesday was at least “tougher,” according to the New York Times. The complete transcript is available for insomniacs, but here’s a quick breakdown of the main points of discussion:

Before Rep. Greg Walden (R-Oregon) started the questioning, he applauded Zuckerberg’s “entrepreneurial spirit” in his opening statement, while adding that the data harvesting scandal has been “deeply disturbing.”

And it turns out that harvesting by Cambridge Analytica also hit Zuckerberg himself, he revealed in answer to Rep. Anna Eshoo’s (D-California) question: “Was your data included in the data sold to malicious third parties?”

In fact, Zuckerberg said his company was thinking about taking action against the U.K.’s esteemed Cambridge University, where developer Alex Kogan created his personality quiz at the center of the data harvesting scandal. Zuckerberg said “something bad” may have been going on there, to which Cambridge later responded by saying he was likely aware of the research work at the institution.

“What we found now is that there’s a whole program associated with Cambridge University where … there were a number of other researchers building similar apps,” Zuckerberg said.

Another big issue, one that Zuckerberg said he was unfamiliar with, was that of “shadow profiles.” This describes the situation in which even if you don’t use Facebook, it’s likely it has information on you.

Rep. Ben Lujan (D-New Mexico) asked Zuckerberg, “Facebook has detailed profiles on people who have never signed up for Facebook, yes or no?” Zuckerberg said that was true, but only to prevent “the kind of scraping you were just referring to.” He was talking about non-Facebook users trying to scrape information from the platform and preventing them from doing it.

As Zuckerberg was under the hammer in Congress, fellow tech billionaire Elon Musk said piled on too, saying, “I think there should be regulations on social media to the degree that it negatively affects the public good. We can’t have like willy-nilly proliferation of fake news, that’s crazy.”

Zuckerberg was also pressed about offering Americans the same data protection controls that Europeans receive under the General Data Protection Regulation that goes into effect next month. Zuckerberg seemed to say he would extend this globally, but he wasn’t exactly clear.

In any case, the CEO’s avoidance of gaffes, if nothing else, seemed to have the intended effect. Although Zuckerberg said he was open to regulation on day one of his testimony, after both hearings, most pundits believe it’s unlikely any bill will be written to protect Facebook users’ data and privacy.

“Zuckerberg’s past two days were an excellent first step in working and communicating with Congressional leaders,” Cowen & Co. analyst John Blackledge wrote in a note to clients.

Image: Time/YouTube