 Classical compatibilists have responded by arguing that determinism is compatible with the ability to do otherwise. To show this, they attempted to analyze an agent’s ability to do otherwise in conditional terms (e.g., Hume, Enquiry Concerning Human Understanding, p.73; Ayer 1954; or Hobart 1934). Since determinism is a thesis about what must happen in the future given the actual past, determinism is consistent with the future being different given a different past. So the classical compatibilists analyzed any assertion that an agent could have done otherwise as a conditional assertion reporting what an agent would have done under certain counterfactual conditions. These conditions involved variations on what a freely willing agent wanted (chose, willed, or decided) to do at the time of her freely willed action. Suppose that an agent freely willed X. According to the classical compatibilist conditional analysis, to say that, at the time of acting, she could have done Y and not X is just to say that, had she wanted (chosen, willed, or decided) to do Y and not X at that time, then she would have done Y and not done X. Her ability to have done otherwise at the time at which she acted consisted in some such counterfactual truth.