I'm looking for stories where the MC (preferably male) gains a power/ability to explain himself through deductive reasoning to get what he wants, even if his argument is very loosely cohesive. For example, if he molests his ex and she gets upset, he can explain that since they have already been intimate their ahouldn't be a problem with him doing stuff like that, they've done it before so it shouldn't matter if they do it again. Obviously thats not how reality works, but his power will do the heavy lifting and she'll think that makes sense and no longer have a problem letting him grope her.
This immediately came to mind while reading your post: https://chyoa.com/story/The-Sophistry-Generator.42034
