Redundant elements at the system or circuit level are usually part of radiation hardening. >Why not just The problem with 'just' is that it's usually not true

Redundant elements at the system or circuit level are usually part of radiation hardening. >Why not just The problem with 'just' is that it's usually not true. Hardening versus redundancy is typical safety engineering problem where details and balance between different requirements, verification and maintenance are important.