When behaving as waves, [particles] can simultaneously pass through several openings in a barrier and then meet again at the other side of the barrier. This "meeting" is known as interference. Strange as it may sound, interference can only occur when no one is watching.

The phrase “fog of the digital” is reminiscent of the earlier concept of the “fog of war” (generally attributed to the Prussian military strategist Carl von Clausewitz), used to describe the complexities and ambiguities inherent in the theater of war.
