These are the answers to three different questions in an introductory philosophy class. The only sources for these materials are someone's notes. It can be at times difficult to create an essay out of such notes, as they some areas can be difficult to understand. The one area that was difficult was the answer on Radhakrishnan, so this needs special attention. The answers are longer than necessary, so enjoy the bonus and you will be able to decide what's not necessary. Kant's contribution is trying to use science to prove metaphysics. Kierkegaard defends Church and faith, while Nietzsche attacks both as a weakness. Radhakrishnan believes that empiricism cannot lead to enlightenment, just intuitive thought.