Related:

• Authentic, adj. Indubitably true, in somebody's opinion.
• Knowledge is true opinion. -- Plato (428-348? B.C.)
• All that was new in them was false and what was true was old. -- Opinion of Darwin's finding
• Indubitably, sir, Indubitably. -- Data to Picard, "Lonely Among Us", stardate 41249.3
• It's the opinion of some that crops could be grown on the moon.
  Which raises the fear that it may not be long before we're paying somebody not to....
• If you want to know your true opinion of someone, watch the effect produced in you by the first sight of a letter from him.
  -- Arthur Schopenhaue...