Normative Signs: The Poetry of "Ought"

The sign below is on the inside — yes the inside — of the exit door for a university classroom. The words seem to affirm that, yes indeed, this is the exit. But the symbol above it is the universal symbol for “NO ACCESS” or something similar. The result is deeply confusing, though it would be interesting to see how many people really are confused in practice, and whether they do in fact hesitate or avoid using the door as a result. The sign, of course, is supposed to be on the OTHER side of the door, to prevent people from entering via the exit door.