Decision: whether or not to attend a concert this evening. Nobody else in the family wants to go. Just me.

Why should I go? It'll be good music, and interesting. It's something to do with the church, which I should support. And I should especially support the event when it coincides with my own interests.

Why shouldn't I go? Well, it's a Sunday evening. I've got work to-morrow. It would mean leaving Lesley on her own with Hannah and Matthew.

Decision: I would like to go, but I can't.