Well, my point is that fiction isn't argument at all, it's a theme for musing on your own questions. It's sometimes useful to read even something you know to be wrong, on a theme interesting for you, written by a thoughtful author. You don't expect to move towards agreement, you know the stuff is wrong, but you can light sparks of your own insight off its pages. When given a mathematical proof, its correctness is for you to appraise. Fiction gives you your own thoughts, take them or leave them.