Teachers and parents instill 'facts' into children.
Literal facts are often greatly simplified for the convenience of the teacher and the level of a child's supposed understanding. Why does the light go on when you flip the switch? -- Because there is electricity. That answer will tide the child over for a while, after which a similar pablum will be offered. Questions about sex and thoughtless answers can be crippling to future adults.
Teachers and parents rarely have real facts, but they feel the need to impress the child nevertheless so they pretend to know. They don't understand electricity, or automobile mechanics or current nutritional discoveries or ANYTHING. They fake it. They lie. The child who is slow to realize that faces a lifetime of ignorance.
Perhaps worse is the oppression of beliefs paraded as facts
From Aesop's fables to legends about Hercules, Moses, Jesus, Tesla and Batman the minds of children are filled with a strange brew. Facts are hard to separate from beliefs. As children grow older, many develop a more sophisticated view of at least some of these 'facts'. But even (especially?) into old age many people believe what they hear from conservative hate mongers, persuasive preachers, advertising fantasies and other questionable sources.
The final problem along these lines is the binary solution to any issue.
A thing is either: true or false; up or down; on or off; left or right... Shades of grey, as one of our regulars likes to say, are not tolerated. Sadly, many polarized opinions on Slashdot indicate the insidious penetration of this concept into the highest realms of intellectual intercourse.(?)
It is supremely difficult for a parent or teacher to say:
"I don't know. Let's see if we can find the best answer to that question."
Every child suffers as a result.