H/CD (Catch-22)

H/CD (Catch-22) refers to a paradoxical rule where a problem cannot be solved because the solution depends on a condition that is itself impossible or contradictory. In the novel "Catch-22," soldiers could be deemed insane and thus eligible to be grounded if they requested to be taken off dangerous missions. However, if they requested to be removed, it was seen as a sign of sanity, meaning they were fit for duty and couldn't be relieved. This circular logic creates an impossible situation, illustrating how certain rules can trap individuals in dilemmas where no acceptable solution exists.