stvolga:

why do all children know the floor is lava game do we all just learn it from older children and inadvertently share it with each other like some natural inevitable cycle why do children discover the floor and the concept of gravity and up and down and suddenly pretend to be afraid of it why do we play with the physical limitations of our world 

There is actually a theory (I don’t remember what it’s called but I think it was like quantum theory maybe) where say a monkey on one island figures out to use a rock to open a coconut. Soon after, all the monkeys on another island will start breaking coconuts with rocks. Knowledge can be learned as a species, not as an individual. That’s also how we know how to draw those S symbols in middle school.