  It is also in Buridan's moral psychology that we find the most plausible explanation of the example which has come down to us known as ‘Buridan's Ass’, in which a donkey starves to death because it has no reason to choose between two equidistant and equally tempting piles of hay. This particular example is nowhere to be found in Buridan's writings, although there are versions of it going back at least to Aristotle (see De Caelo  295b32).[57]  The best explanation of its association with Buridan is that it originated as a parody of his account of free choice by later critics, who found absurd the idea that the will's freedom could consist in inaction, i.e., in its ability to defer or ‘send back’ for further consideration any practical judgment which is not absolutely certain.