Writing is the best forcing function for clear, structured thinking.
Common reasons I hear folks say they don't want to write a proposal down: "It will slow us down", "Slides are more persuasive", "We've already discussed all the details", "I'm a better verbal communicator", and dozens more.
I've found more often than not these all mask the underlying issue: writing (well) is hard, and requires a deeper inspection into an idea than any alternative. You never know what conflicting evidence you might find.
Thoughtful docs are the closest thing to an antidote for motivated reasoning. It lets the writer introspect deeply, and informed readers give feedback more critically.
