Matt’s Reviews > Thinking, Fast and Slow > Status Update

The Lazy Controller - Self-control and system 2 draw from the same budget of effort. If ask to do 23 x 78 while walking, one stops to do it. All variants of voluntary effort - cognitive, emotional, or physical - draw down a shared pool of mental energy. Called ego depletion. System 1 solves problem (wrong) do you hand it off to system 2 to check? 50-50 for Harvard students.