The only traitors then would have been those who failed to acknowledge her!

On the other hand, there is something very wrong with failing to acknowledge that help.

The game further frustrated him when it failed to acknowledge the correct key.

Too often the country fails to acknowledge how widespread the practice is.

It failed to acknowledge that Americans are a varied lot.

And who can fail to acknowledge that this is the very core of his force as an author?

Two aircraft failed to acknowledge the order, and he had to repeat it.

But we could hardly fail to acknowledge each other's presence somehow.

But what this fails to acknowledge is that people are strange.

The report fails to acknowledge this, as it ought to.