If you don’t have a systematic way of iterating your ideas, your method of generating ideas is just free-association. So making an argument from “exhaustive free-association” means you’re arguing that your free association is exhaustive. Which it never is.
If you don’t have a systematic way of iterating your ideas, your method of generating ideas is just free-association. So making an argument from “exhaustive free-association” means you’re arguing that your free association is exhaustive. Which it never is.