Short abstract (98 words). Reasoning is generally seen as a means to improve knowledge and make better decisions. However, much evidence shows that reasoning often leads to epistemic distortions and poor decisions. This suggests that the function of reasoning should be rethought. Our hypothesis is that the function of reasoning is argumentative. It is to devise and evaluate arguments intended to persuade. Reasoning so conceived is adaptive given humans’ exceptional dependence on communication and vulnerability to misinformation. A wide range of (...) evidence in the psychology of reasoning and decision making can be reinterpreted and better explained in the light of this hypothesis. (shrink)

The paper analyzes the two types of self-deception, usually labeled straight and twisted self-deception. In straight cases the self-deceptive belief coincides with the subject’s desire. In twisted cases, by contrast, the self-deceptive belief opposes the subject’s desire as in the example of Othello’s conviction of Desdemona’s infidelity. Are both these contrasting types of deceptive beliefs cases of SD? The argument of this paper shall answer this question in the positive, yet in different way from the unitary explanation of straight and (...) twisted SD proposed by Alfred Mele. The causal account of SD claims to provide a unitary and simple explanation for both straight and twisted SD, and considers such a unitary explanation as a specific virtue of the causal view. Within the same causal model, the difference between straight and twisted self-deception is explained by a difference in the motivational state that in twisted cases is dominated by emotions. The paper will critically examine this claim, and advance an alternative explanation based on a different view of self-deception where emotions play a role alongside wishes both in straight and in twisted case. (shrink)