What does the taste of salt have in common with why we sleep?
They are both concepts that everyone understands but are almost impossible to explain, according to a recent brain-bending Reddit thread.
Read on for more examples of things that you know you know, but you know you wouldn't be able to explain.
What a color looks like. Imagine explaining the colour purple to a blind person. Everyone knows purple but its hard to explain.
That Nickelback has sold 50 million albums.
The taste of water
The definition of the word "the".
Moving. You can wave your arm around but can you explain how you are doing it?
Terms and Conditions agreements
The nod. Everyone knows it, and it'll come up in everyday situations. But it means a lot of different things to different people, but no one can explain where it came from or who taught them the nod
The voice inside your head as you read this