Hence - What is that "on his own"? How can a person intuit something "on his own"? When directly confronted with a question like "Do you believe that you know The Absolute Truth?", few people would reply affirmatively, as this does seem a preposterous question, answering it affirmatively would be nothing less than the declaration of omniscience. Nevertheless, for all practical intents and purposes, people do believe that their opinions aren't merely opinions, but The Absolute Truth itself; ie. that the way they see things really is "how things really are", and not just a reflection of their subjective preferences.