1) The document contrasts the differing philosophies of Mark Zuckerberg and Christopher Poole regarding transparency and anonymity online. Zuckerberg believes in complete transparency with one single identity, while Poole advocates for some level of anonymity. 2) As their companies Facebook and 4chan grew, both Zuckerberg and Poole moved their stances somewhat towards the center, adding more options for control and verification while still maintaining aspects of their original philosophies. 3) The challenges of context collapse online, where audiences are unknown, shape how the tools of Facebook and 4chan evolved regarding transparency versus anonymity for their users.