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    $\begingroup$ It doesn't. Actor-critic is a separate learning algorithm to Q-learning, and Q-learning should have an "action-value function" which is similar conceptually to the critic in Actor-critic, but not the same. Could you provide a link or quote the text? It might be confusing text on the tutorial, or a misunderstanding. $\endgroup$ Commented May 10, 2018 at 13:03
  • $\begingroup$ Yeah I was afraid that I may have confused one way of using Q-learning as the common definition of Q-learning. I will add a quote when it first mentions actor and critic models. $\endgroup$ Commented May 12, 2018 at 4:52