Here's another unfinished sentence I created for my notebook, ROAM (Remnants Of Abstract Minds), and some of the responses I received in August 1992:
A nagging conscience is most annoying when...
...you're trying to read. (Michelle T.)
...the source of the nagging conscience is self-doubt. (Brian W.)
...the choices involved are a lesser-of-two-evils dilemma. (Paul I.)
...the person you've betrayed is being really, REALLY nice to you. (Jenni S.)
...What nagging conscience? (Michael M.)