 Intending is thus a ‘pro-attitude’ of some kind—assuming, for simplicity, that intention is a mental state. In his later work, Davidson specified this pro-attitude as ‘an all-out, unconditional judgement that the action is desirable’ (Davidson 1978, p. 99). He made two further refinements. First, when one is doing A intentionally, ‘at least when the action is of brief duration, nothing seems to stand in the way of an Aristotelian identification of the action with [all-out evaluative judgement]’ (Davidson 1978, p. 99). Second, one counts as intending an action only if one’s beliefs are consistent with one’s performing it; one cannot intend to do what one believes to be impossible (Davidson 1978, pp. 100–1).