Hacker News on 1 December 2018

• A Programmer's Introduction to Mathematics
• Psychology’s Replication Crisis Is Real
• The EU Copyright Directive: What Redditors in Europe Need to Know
• Show HN: Cross-platform open-source 3D modeling software
• The Octopus Is Smart as Heck, But Why?
• 8K is now being broadcast in Japan
• “I didn’t meet my girlfriend until 12 years after our daughter was born”
• The Second Edition of “Refactoring”
• The Making Of Dust (2003)
• The little black book of scams (2016)