noun (n)

• a declaration that is made emphatically (as if no supporting evidence were necessary)(noun.communication)

  Synonym:
  asseveration, averment
  

  source: wordnet30
• the act of affirming or asserting or stating something(noun.communication)

  Synonym:
  affirmation, statement
  

  source: wordnet30
• The act of asserting, or that which is asserted; positive declaration or averment; affirmation; statement asserted; position advanced.(noun)

  source: webster1913