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No security system is foolproof.
linked to #945683
linked to #945842
linked to #1597124

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Sentence #945663

No security system is foolproof.
Aucun système de sécurité n'est infaillible.
Żaden system zabezpieczenia nie jest niezawodny.
Ningún sistema de seguridad es a prueba de fallos.
Neniu sekursistemo estas fidinda.