Related Clues:

• Mistake
• Do blackboard duty
• Demagnetize, as a tape
• Make a miscue
• Get the lead out
• Go off track
• Act humanly
• Get the lead out
• Wipe away
• Slip a cog
• "To ___ is human ..."
• Show you're human
• It may be done on the side of caution
• Prove one's humanity?
• Prove to be human?