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In this video I will deductive reasoning to determine who is telling the true given the follow rules: 1) Frank says that Tony lied; 2) Tony says that Jimmy lied; 3) Jimmy says that both Frank and Tony lied; 4) If Frank is telling the truth. What can you conclude about Jimmy? Who's telling the truth?

Next video in this series can be seen at:
https://youtu.be/Sc082X0I4RA