Immanuel Kant was a German philosopher who was a big philosopher during the Enlightenment. Kant goes a step further from Lessing and attempts to conflate rationalism and empiricism. For Kant, we have to talk about his filter -- the filter that he claims we all have. It's a little bit like worldview, but it's slightly more obscuring than that. If we look at something, we categorize it and process it based on preconceived notions. Therefore, Kant delves largely into the study of what we know.