While some of us may think that we have it all figured out — the sky is blue, grass is green, etc. — there’s a whole lot of common knowledge that is anything but actual knowledge.

For example, did you know that “curiosity may have killed the cat,” but that “satisfaction brought it back?” Similarly, blood isn’t actually thicker than water: The saying supposedly goes that “the blood of the covenant is thicker than the water of the womb."

But it isn’t just kitschy sayings that are prone to misinterpretation. From statistics on average life expectancy to the truth about whether 50% of marriages actually end in divorce, here are 20 facts and ideas that are often taken way out of context, as told by the fine folks of r/AskReddit.