Okay, so i forgot...what's it called?

Question

what's it called when a phrase contradicts itself or whatever? for example: true lies

okay, i could probably try to think of a better example, but my brain isnt working correctly today, which, of course, is why i'm asking this question in the first place.

Answer 1

Oxymoron is the word for those contradictory expressions.

  Some other examples:

   Living Dead

   deafening silence