Definition of Foolproof
incapable of failing
Examples of Foolproof in a sentence
The directions are so simple that they are practically foolproof, even a toddler could figure it out without being able to read.
They said that this plan was foolproof, but I suppose Brendan was just the kind of fool it needed to mess it up.
We were told that the backup generator was foolproof, but this was proven false when there was a power outage and it didn’t come on.
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