The defendant claims to know nothing of the crime or violation for which he's in trouble. From the old TV series, "Hogan's Heroes," where the prison camp guard, Sgt. Schultz, upon learning of some prank or escape the POWs were planning, would say, "I know nussink!"
Definitions include: A system set up to be so needlessly ambiguous, complicated and confusing that it serves as a rorschak test for unwilling participants mired in it, rather than as anytihing remotely sane. It has the advantage that people who get confused and frustrated can be blamed for their own stupidity, laziness, irrationality, irresponsibility or insanity, so that the shitheads building the same evade all responsibility for their prioritization of the profits of some surveillance creeps at Facebook/Google etc. over the rights of random people just trying to get by.