CEP Executive Director David Ibsen writes: "The American Congress and the European Parliament deserve enormous credit for convincing the CEO of one of the world’s biggest companies to testify but the Members who will be questioning him should learn from the US example. The combination of granting too much defence and limiting each questioner to five minutes or less made it too easy for Mr. Zuckerberg to rely on his highly-polished talking points and carefully crafted spin to deflect unwanted questions and prevent thorough airing of issues like Facebook’s troubled business model and its insufficient efforts to crack down on the misuse of its platform. Different ground rules or even the additional presence of Facebook engineers would have resulted in a more serious examination of Facebook’s endemic policy failures."