You're changing the subject. The fact that it is possible to have a discussion (whether empirical or not) about the nature of evidence or of what constitutes a

You're changing the subject. The fact that it is possible to have a discussion (whether empirical or not) about the nature of evidence or of what constitutes a fact, and even that this might be a very fruitful thing to discuss, does not suddenly make a statement like "philosophy improves critical thinking" true and beyond questioning.