indeterminate vs nonconvincing

indeterminate

adj
  • Not accurately determined or determinable. 

  • Not definitively or precisely determined, because of the presence of infinity or zero symbols used in any of several improper combinations. 

  • With no genetically defined end, and thus theoretically limitless. 

  • Designed to allow the incorporation of future changes whose nature is not yet known. 

  • Not topped with some form of terminal bud. 

  • Intersex. 

  • Imprecise or vague. 

noun
  • a variable. 

  • A symbol that resembles a variable or parameter but is used purely formally and neither signifies nor is ever assigned a particular value; 

nonconvincing

adj
  • unconvincing 

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