 Like Carneades, Alexander believes that his own doctrine of free choice doesn’t introduce motion without a cause. A person has various motives they can act on: they may want to obtain this pleasure or that one, or to get something that they believe is to their advantage, or to do something because they think it’s the right thing to do. Nothing predetermines or necessitates what the person will end up freely choosing to do: they might accept this job or that one, given the competing considerations in favor of each, and they can value the pleasure of cake over the importance of keeping their promises, or vice-versa. But no matter what they end up choosing, they are the cause of their own choices and of the actions that result from them (Alexander, On Fate ch. 15).