“Tow-Away No Parking 6 p.m. to 3 a.m.” (arrow pointing right) means that you cannot park to the right of the sign during the hours posted. “2-hour parking Mon.-Sat. 8 a.m. to 6 p.m., Sun. 11 ...

When a hand rotates the arrow 180 degrees so that the tip should be facing left, something peculiar happens: The arrow still, somehow, appears to be pointing right. In fact, no matter how many ...