moot point vs motive

moot point

noun
  • An issue that is subject to, or open for, discussion or debate, to which no satisfactory answer is found; originally, one to be definitively determined by an assembly of the people. 

  • An issue regarded as potentially debatable, but no longer practically applicable. Although the idea may still be worth debating and exploring academically, and such discussion may be useful for addressing similar issues in the future, the idea has been rendered irrelevant for the present issue. 

motive

noun
  • An incentive to act in a particular way; a reason or emotion that makes one want to do something; anything that prompts a choice of action. 

  • A motif; a theme or subject, especially one that is central to the work or often repeated. 

  • A motif. 

  • Something which causes someone to want to commit a crime; a reason for criminal behaviour. 

adj
  • Relating to motion and/or to its cause 

  • Causing motion; having power to move, or tending to move 

verb
  • To prompt or incite by a motive or motives; to move. 

How often have the words moot point and motive occurred in a corpus of books? (source: Google Ngram Viewer )