Hacker News on 25 December 2018

• DOOMBA
• Human blood cells can be directly reprogrammed into neural stem cells
• Teach Yourself Logic: A Study Guide [pdf]
• Mental Models I Find Repeatedly Useful (2016)
• Emacs Fireplace
• T * sin (t) ≈ Christmas tree
• Show HN: Wiv.js – A library for a more wiggly div
• Machine learning has become alchemy (2017) [video]
• My video with 47M views was stolen on YouTube [video]
• Tell HN: Merry Christmas