|belt and suspenders
- redundant, Redundant systems, affording mutual backup in the event of one failing.
adjective (pos=belt and suspenders, -)
- He believes in a , booking flights from two different airports on different airlines for important trips.
(idiom) Having several layers of protection; redundant or over cautious
Not wanting to take additional risk, he went with the "" option, purchasing both the extended warranty and the on-site service policy.
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