Hacker News on 30 September 2019

• In Defense of Richard Stallman
• WeWork says will file to withdraw IPO
• HEAD – A guide to elements
• Mesh Spreadsheet
• Tensorflow 2.0
• 20,000 Startup Ideas
• KDE is adopting GitLab
• Scientists Identify How Many Trees to Plant and Where to Stop Climate Crisis
• Hard comp-fi reading list
• Instagram Threatened Removal of Verified Status for Posting Snapchat Content