Schroedinger's turd 

The dilemma of flushing the toilet with a closed lid; there is a 50% chance that the turd is still present. The turd is equally alive and dead, until somebody lifts the lid.

'I've just flushed a big one; I fear the paradox of Schroedinger's turd'

Schroedinger's turd by CJV August 27, 2012