"The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence". (Who said Java?)
The same notion is related to the concert of "the beginner's mind" popularized by D. T. Suzuki and S. Jobs. Packers call it "thinking out of the box". J. Krishnamurti call it 'freedom from the "known"' (people call all kinds of nonsense "knowledge").
Children learn so quickly and efficiently because they are not habitually pattern matching against personal experiences, cultural conditioning and popular memes - the way most adults do, but are still building the map of the world out of so called primordial awareness, or the Buddha Nature.
But "the map is not the territory".
And finally - “Trust those who seek the truth but doubt those who say they have found it.”