If I remeber correctly, tit-for-tat in the game theory is referring to a proportional response to an uncooperative action. For example, you take an action is 1

If I remeber correctly, tit-for-tat in the game theory is referring to a proportional response to an uncooperative action. For example, you take an action is 10% unfavorable to me. In response, I take an action that is 10% unfavorable to you. So next turn you take the most favorable action for you+me, and so I take the most favorable action for me+you. I guess a proportional response signals wanting a mutually beneficial, rational approach.