Pseudoscience refers to activities that superficially have the aesthetics of science but do not follow its constraints. For example, homeopathy is pseudoscience. They dress in white coats and use chemistry lab equipment, but they do not test their ideas with experiments that could falsify them. This has nothing to do with reasoning with the current scientific theories. What do you think theoretical physicists do?
I say this because more and more I notice people using "pseudoscience" in a sense similar to "heresy", and treating philosophy as some sort of inferior system of knowledge that is bound to be replaced by science. These people misunderstand both science and philosophy, and would benefit from a bit more of reading and thinking outside of their comfort zone.