generalisation vs presupposition

generalisation

noun
  • Inductive reasoning from detailed facts to general principles. 

  • The formulation of general concepts from specific instances by abstracting common properties. 

presupposition

noun
  • The act of presupposing. 

  • An assumption made beforehand; a preliminary conjecture or speculation. 

  • An assumption or belief implicit in an utterance or other use of language. 

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