The RDF was said by Andy Hertzfeld to be Steve Jobs' ability to convince himself and others to believe almost anything with a mix of charm, charisma, bravado, hyperbole, marketing, appeasement and persistence. RDF was said to distort an audience's sense of proportion and scales of difficulties and made them believe that the task at hand was possible. Jobs could also use the RDF to appropriate other's ideas as his own, sometimes proposing an idea to its originator after dismissing it the week before.[3]