The feeling of something being obvious or easy [...] doesn’t mean that [it] is obvious or easy to everybody. It just means that you have understood it. When you deeply understand something it becomes obvious and easy over time.
The feeling of something being obvious or easy in the above sense can be mistaken sometimes. It is an intuition or heuristic our brain applies I guess to figure out which things we are supposed to know in a tribe. It can be put on more solid footing by spelling out things and being forced to make intuitions explicit.
Related: As I wrote just recently:
https://www.facebook.com/Xuenay/posts/10161257148333662?comment_id=10161257444543662
The feeling of something being obvious or easy in the above sense can be mistaken sometimes. It is an intuition or heuristic our brain applies I guess to figure out which things we are supposed to know in a tribe. It can be put on more solid footing by spelling out things and being forced to make intuitions explicit.