determinative vs irrefutable

determinative

adj
  • Sufficient to decide something (such as a question of fact or of law). 

noun
  • A member of a class of words functioning in a noun phrase to identify or distinguish a referent without describing or modifying it. 

  • An ideogram used to mark semantic categories of words in logographic scripts. 

irrefutable

adj
  • undeniable; unable to be disproved or refuted 

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