Hacker News on 12 February 2012

• What I've Learned About Smart People.
• Are You a Zen Coder or Distraction-Junkie?
• Ask HN: What are the good old ideas that still make money on the web?
• Why Concatenative Programming Matters
• Reddit: a necessary change in policy
• Be Careful When Comparing AWS Costs...
• One Story of Nikola Tesla
• Post-Mortems For Ten Products I've Built
• Why Facebook is never safe
• The 17x17 problem solved