contradiction vs subpoena

contradiction

noun
  • A statement that contradicts itself, i.e., a statement that claims that the same thing is true and that it is false at the same time and in the same senses of the terms. 

  • A logical inconsistency among two or more elements or propositions. 

  • The act of contradicting. 

  • A proposition that is false for all values of its propositional variables or Boolean atoms. 

subpoena

noun
  • A writ requiring a defendant to appear in court to answer a plaintiff's claim. 

  • A writ requiring someone to appear in court to give testimony. 

verb
  • To summon with a subpoena. 

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