Originally Posted by
MorpheusSandman
I think the best use of rationality is problem solving. Irrational people often find themselves in messes that, firstly, could've been prevented with some rational planning and, secondly, could be solved if they had the rationality to know how to solve it. Educating myself on "the art of rationality" has really transformed the way in which I approach life and problems, and it's made things (even bad things) much easier to deal with. So I certainly think rationality has its utilitarian aspects. On the other hand:
There is a school of philosophy that says that reason/logic can't tell you anything new you don't already know. The thing about questions like these is that there isn't any external, objective answer, so there really isn't a way in which to reason your way to a correct answer. Things like "what is the meaning of life?" assumes that life has some objective meaning that can be found outside ourselves. Similarly, "why does evil exist?" and "why is murder wrong?" assume that there is something objective as evil, or that murder is actually wrong. The truth of these matters is that we come pre-programmed to survive, reproduce, and be happy, so when things threaten that we call them "evil" and "wrong." These terms describe our subjective reaction to external events on us, and they "exist" because evolution has programmed us to survive. Similarly, it's programmed other beings to survive as well, and sometimes one being surviving means making it so another being doesn't survive, and, in such a scenario, it's only "evil" to the one that doesn't survive. You can't reason your way to God's existence either, since existence isn't something you can prove by reason. You may can reason it's more or less likely given the evidence, and then it will come down to how you assess that evidence, but that has as much to do with assimilating knowledge as opposed to reason. Similarly, we can only answer the evil/wrong question because of our discovery of evolution and how it affects us mentally and socially. So there's another case of science leading to facts that answer certain questions. Sometimes the answers turn out to be completely different than what we expected.