Often the brightest people are the clearest about what they don't know. Do you really know that the earth is round with the SAME certitude that you know fire burns your skin. Many educated people in the U.S. believe everything that they hear about science. They might as well have been born dogs, for all the use they make of their rational minds. Judge for yourself, and examine your relationship to what you hear.
Most people are really foggy about what it means to know something.
They think they know a subject if they have memorized many facts about it. Think about it, this requires self-examination.