'Am -- brother's keeper?', 3 letters
Am ___ brother's keeper? (the earliest recorded snotty reply, perhaps), 3 letters
Am ___ brother's keeper?: Genesis, 3 letters
1998 Dion/Kelly duet, 11 letters
Friend-in-need's helpful tagline, 9 letters
Confident words, 9 letters
Qualified fellow's boast, 9 letters
Redundant referral in first person, 7 letters