“slavishly rationalist” and “mere logic”

From Kas Thomas, on the limits and overselling of CBT:

CBT has been criticized (appropriately, I believe) on theoretical grounds for its slavishly rationalist bent and its insistence that mentally ill people can fix their problems with what amounts to exercises in clearer thinking. M.B. Shapiro Award winner Chris Brewin (University College London) questions the idea that challenging a person’s thoughts leads to changes in feelings and behaviors. He suggests that human cognition actually draws from multiple memory systems and personal-knowledge stores, not all of which are open to introspection. Teasdale (in this book), along the same lines, contrasts “propositional” meanings (which are semantic and declarative) with “implicational” meanings (holistic meanings reflecting the “felt sense” of experience, thus tied to emotion), and questions whether the latter can be assailed with mere logic. Someone suffering from depression isn’t necessarily interested in having his logic proved wrong, or being told that every problem can somehow be reduced to a distortion in perception. One of the signature features of mental illness is the convincing illusion that everything you’re thinking is 100% real and accurate, even when you’re delusional. Indeed, depression is often (subjectively) a feeling of experiencing reality too accurately.