30. 18. Santos FP. SantOS FC, Pache<0 1M (2018) SOCHI norm complexity and past reputations in the evolution of cooperation. Nature 555242-245. 19. Brandt H. Sigmund K (2004) The logic of reprobation: Assessment and action rules for Indirect reciprocation. Theor Blot 231:475-486. 20. Ohtwki µ Iwasa Y (2004) How sh