perseveration

noun4

1. •
   An uncontrollable repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of a stimulus, usually caused by a brain injury or other organic disorder.
2. •
   The tendency to continue or repeat an act or activity after the cessation of the original stimulus.
3. •
   The act or an instance of persevering; perseverance.
4. •
   An argument by repetition; a mantra.

   • Being subjected to this mantra once more re-evokes the perseveration we routinely suffer in the moral ambiguity characterising our supposedly post-politics milieu. — 2006