Implements nil exploration (no exploration strategy) [A, ACTION] = NILEXPLORE(A, ACTION, STATE, ACTIONS, REWARDS, PARAMS) An exploration function for the agent that performs nil exploration. Always returns the action chosen by the agent. Should be used only in inherently stochastic domains, where exploration is inherent in the stochastic nature of the domain. Can be used with any learning/policy functions combination. See also act, explore