1. They argued away yesterday morning.

2. The postman argued away his misdelivery of the mail.

3. We sometimes argued away for a long time.

4. They sometimes argue away for hours.

5. He tried to argue away his mistake.

6. He could not argue away the fact.

7. He simply could not argue away the fact that he had not done all he could.

8. He's not going to be frightened unless we've got something he can't argue away.