Writer’s block is a good example of a dispositional fallacy: A description of behavior can’t also explain the described behavior. Writer’s block is nothing more than the behavior of not writing. Saying that you can’t write because of writer’s block is merely saying that you can’t write because you aren’t writing. It’s trivial.
Paul Silvia, How to Write a Lot: A Practical Guide to Productive Academic Writing, Washington, DC, 2007, pp. 45-46