Design Confirmations by Weight, Not by Count
■ The same confirmation, asked three times, stops being read at all Hakobukun checks the delivery to Room 303 in the same form, again and again. Dr. Tanaka is in a hurry, and each reply comes faster and lighter. By the second check, he is no longer looking at the screen. Repetition teaches people to answer without reading.
■ The truly dangerous question slips through on the same reflex Then comes "Initialize?" It looks like every check before it, so he answers "Got it!" at the same speed. This is confirmation fatigue. When an irreversible action is confirmed the same way as a routine one, people cannot tell them apart.
■ Conclusion: Choose confirmations by how irreversible the action is Adding checks for safety quietly dilutes safety. Reserve confirmation for actions that cannot be undone, and make those look and feel different from everything else. A destination needs one check; a reset needs a different path. When weight shows, people pause. More confirmations are not caution; they are handed-off responsibility.
