Credulous: having views about the world, the universe and humanity's place in it that are shared only by very unsophisticated people and the most intelligent and advanced mathematicians and physicists.
Terry PratchettIt must be hard for humans, forever floundering through inconvenient geography. Humans are always lost. It's a basic characteristic. It explains a lot about them.
Terry PratchettThe conversation of human beings seldom interested him, but it crossed his mind that the males and females always got along best when neither actually listened fully to what the other one was saying.
Terry Pratchett