Pardon if this is a basic question; there are only 5 threads on this forum regarding the ability in mind, and none of them actually explain how it works.
Looking through the PHB2, I see the Deva Racial Power Memory of a Thousand Lifetimes has its trigger state the following:
You make an attack roll, a saving throw, a skill check, or an ability check and dislike the result
Below that is the Effect and some flavor text, but nothing further explaining this. Specifically, what does it mean to "dislike the result?" That's a difficult term to search here or on Google, as it more or less just comes up with hatemail for 4e.