If you have not yet learned this logic of old, then you are here to soon. There is no tool to replace it. Those without it are only guessing. Logic makes art of science, and science of art. Logic is among the subjects which should be taught first.
Logic is the simplest of arithmetic.
Logic is the difference between correct and incorrect reasoning. Philosophy is the love of science. This is an artistic expression of my opinions, not stone cold logic. I begin this writing, as the third millenium dawns. The past several centuries have seen mankind develope a societial infrastructure based upon new technologies.