On Mission near 17th there’s a handwritten sign in a store window that reads:
Q: Can you spot the gramatical errors on the above sign?
A: No. There are so many problems it’s impossible to assign a concrete number. For example, should the sign say “We make copies of keys”? Or maybe it could simply read “Keys copied”? Regardless, there’s more than one correct answer. The only thing we can say for certain is that apostrophes should not be involved.