Classroom questions for the 2nd round of the video How to decide your best strategy in a PD? Why NATURAL SElECtion cannot generate cooperation Why TFT>ALL D>ALL C>G-TFT>TFT? What is the difference between direct reciprocity(直接互惠) and indirect reciprocity?Classroom questions for the 2nd round of the video • How to decide your best strategy in a PD? • Why NATURAL SELECTION cannot generate cooperation? • Why TFT>ALL D>ALL C>G-TFT>TFT? • What is the difference between direct reciprocity (直接互惠) and indirect reciprocity?