Is the security of the system compromised because of unexpected failures?

The unexpected failure may be an equally important innovation opportunity source.

And there were other, unexpected failures in our apparently shared language.

The larger the system, the greater the probability of unexpected failure.

Perrow says that multiple and unexpected failures are built into society's complex systems.

To fall down them, you are threatened with unexpected failure in your affairs.

The networks said they had contingency plans in case the pool fell victim to an unexpected failure.

He knew the reason for the unexpected failure.

He often tries to sneak a kiss, but is met with a similar unexpected failure.

Even the unexpected failure of his control spell wouldn't slow him down.