[philihp]

Imagine knowing this, and still using the imperial system

[otteromkram]

Some of us don't have to imagine; your dream is our reality.

Plys, the US uses both systems. Imperial is just more practical for everyday use.

See your foot down there near the ground? Tada! You have a built-in measuring tool. How neat is that?

[deadbunny]

Because feet are a standard size of course. No variance from person to person.

[moring]

You can use your hand in a similar way: Spread your thumb and little finger in opposite directions. That's 20cm, with roughly the same accuracy as measuring a foot with a real foot.

[devnullbrain]

Survey foot or international foot?