Many philosophers (such as J. H. Sobel, R. J. Wallace, G. Harman, M. Bratman, and J. D. Velleman) endorse something along the lines of the following normative requirement regarding intention:
R1: It is impermissible/irrational for S both to intend to X and to believe that she will not X (even if she intends to X).
And I think that most (all?) philosophers endorse something along the lines of this requirement of instrumental rationality:
R2: It is impermissible/irrational for S to intend to Y, believe that X-ing is a necessary means to Y-ing, but not intend to X.
But are there any philosophers who endorse the following requirement?