Hacker News on 27 July 2012

• Sal Khan responds to critic
• Gnome: Staring into the abyss
• 1987 Time Capsule Predictions by Sci-Fi Writers About 2012
• How to add a new syntactic feature to PHP
• A Redditor about the problem with today's Silicon Valley startup community
• A Different Road To Work, Bypassing College Dreams
• Government: we can freeze Mega assets even if case is dismissed
• Dave Winer: An open Twitter-like ecosystem
• How well does Khan Academy teach?
• Economics of Google Fiber and what it means for U.S. broadband