Hacker News on 7 January 2010

• Letter to the Patent Office from Professor Donald Knuth (circa 1994)
• Unladen Swallow: Python 3’S Best Feature
• Best of Vim Tips
• Why did we take reddit down for 71 minutes?
• How many frames can humans see
• The Generalist's Dilemma
• Math visualization: (x + 1)^2
• A Mad Scheme To Kill A Scientist
• What makes a great teacher?
• My $1/day Adwords Account