conjecture vs deduction

conjecture

noun
  • A statement or an idea which is unproven, but is thought to be true; a guess. 

  • A statement likely to be true based on available evidence, but which has not been formally proven. 

  • A supposition based upon incomplete evidence; a hypothesis. 

verb
  • To infer on slight evidence; to guess at. 

  • To guess; to venture an unproven idea. 

deduction

noun
  • A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true. 

  • A conclusion; that which is deduced, concluded or figured out 

  • The ability or skill to deduce or figure out; the power of reason 

  • That which is deducted; that which is subtracted or removed 

  • A sum that can be removed from tax calculations; something that is written off 

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