Things you have realized long after the fact (and possibly obvious in hindsight)?

[Luna the Great of all the Russias 2,705]

Are there some things that you have realized only after a long period of time (and was possibly obvious in hinsight)?

Somehow, I thought the expression "hear ye, hear ye" were single words (something like "hearee, hearee").

[TBD 17,228]

Santa Claus is not real. But then again,

 

[Venomous 18,813]

I mean, when I was a child, I thought that all women magically became pregnant and had no choice in having children.

That terrified me 

[Evil Pink One 12,990]

Chewing gums get stuck in your stomach and can kill you.

[Lord Chin Chin 1,201]

That putting frozen pizza in microwave is a bad idea

[Splashee 28,537]

Not in the case of telling people something, and then changing my mind later. But there have been times I have realized mistakes way too late, especially as a child.

[ExplosionMare 18,007]

I tend to miss very obvious things a lot, like I’ll stare at a math problem for hours thinking it’s impossible only to realize I forgot a - or something later

[Trot Shuffle 3,595]

Math problems will be written sometimes as a little story purely for reading comprehension.

Like, the "This person had 4 apples and then ate 2 of them, how many do they have left?" kinds. 

I always just thought they wanted to make it annoying for us students.