The 50/50 CISO decision centers on a moment of critical uncertainty where an executive must choose between two conflicting realities: the Operational view, showing the process is running smoothly, and the Cybersecurity view, flagging a potential breach. Faced with this dilemma, the CISO must decide whether to shut down the plant – potentially wasting millions in a false alarm – or ignore the alert and risk a catastrophic physical failure if an attacker is “spoofing” the data.