So she was a victim of understandable human error.

To the Editor: I wish to correct Craig Wolff on one understandable error.

In spite of the rare, and usually understandable error the Americans have been an unqualified boon ...

That was an understandable but foolish error.

Under the circumstances, many expert observers would have found the error rate understandable, if not acceptable.

It was a foolish but understandable error to think one could gain entry into Lardner's world by meeting the man.

He'd mistaken them for a band of outlaws, but it was an understandable error.

"If you couldn't translate our message, it was an understandable error."

"An understandable error," the teller said sympathetically.

Decker laughed at his understandable error.