The rule is about data structures but I feel it has wider applicability user choices in software. You should either give the user no choices, give them individual binary choices, or let them pick anything that could theoretically be valid and design your system to assume they'll sometimes pick invalid options which will need to be handled appropriately.
https://en.wikipedia.org/wiki/Zero-one-infinity_rule
The rule is about data structures but I feel it has wider applicability user choices in software. You should either give the user no choices, give them individual binary choices, or let them pick anything that could theoretically be valid and design your system to assume they'll sometimes pick invalid options which will need to be handled appropriately.