Refraction. It could be an image taken in a reflective surface, it could be light bent from behind an object, or it could mean remedial math homework.
Signs are functional, but can also be decorative. Signs can direct us where to go, but they’re also pieces of art, which reveal much about the time period and culture in which they were made.
“Problems are not stop signs, they are guidelines”
(Robert H. Schuller)