To err is human, but to really foul things up you need a computer.

To err is human, but to really foul things up you need a computer.

To err is human but to really foul up requires a computer.

To err is human, but it feels divine.

To err is human. To blame someone else is politics.

To err is human also in so far as animals seldom or never err, or at least only the cleverest of them do so.