  Second, it is important to be clear that in neither case do the characteristic modifications of attitude occur infallibly. There is room for irrationality both in the theoretical and the practical domain, which in its strongest form involves a failure to form the attitudes that one acknowledges to be called for by the considerations one has reflected on. Thus a person might end up reading a mystery novel for another hour, while at the same time judging that it would be better on the whole to go back to work on their paper for the upcoming conference. Practical irrationality of this latter kind is known as akrasia, incontinence, or weakness of will, and its nature and even possibility are traditional subjects of philosophical speculation in their own right. If we assume that this strong kind of practical irrationality is possible, however, then we must grant that practical reason is not automatically practical in its issue. A more accurate way to represent the consequences of practical reason would be to say that deliberation about action generates appropriate intentions insofar as an agent is rational (Korsgaard 1996a).  