When trying to understand the title “What is accepted as knowledge today is sometimes rejected tomorrow”, the first thing I deliberated on was the evolution of theories and concepts. It can be said that once a new discovery of a theory or concept is complete, the old one will most likely be discarded and no longer accepted as knowledge. However, it can also be argued that old theories or concepts are not always discarded but evolved, as they become part of the new theory. It really depends on how one defines what is discarded. In this essay I will focus on the knowledge areas of natural science and history, because many questions of knowledge are left behind in these two areas, as scientists and historians are constantly discovering new theories and truths about the past. In this theory of knowledge essay, I will discuss the new skull discoveries in Georgia and how the ancient theory of human evolution might be rejected. I will also discuss the relativity of faulty theories and the flaws of deduction and the scientific method. Natural sciences belong to the new era of knowledge. The scientific revolution of the 17th century is at the heart of everything we need to believe in today's society. Great scientists like Isaac Newton and Charles Darwin and many others discovered in just over three centuries the fundamental laws of gravity, the 92 elements of the periodic table, the theory of evolution and many other discoveries , all accepted today as knowledge. However, scientific theories that once constituted knowledge have been abandoned in modern times. Given that the natural sciences have an ever-changing history over time, one might then ask to what extent they actually... middle of article...theories must have been precise enough for progress can be made. From this we can conclude that today's theories might be considered false and rejected in the future, but they are much truer than they have ever been and therefore should only be considered incomplete. Bibliography: Asimov, Isaac. “The relativity of evil”. The relativity of evil. United States: Doubleday, 1988. 35-44. The relativity of evil. Double day. Internet. November 24, 2013. .Lagemaat, Richard Van De. Theory of knowledge for the IB diploma. Cambridge: Cambridge UP, 2005. Print. Switek, Brian. “Wonderful Skull Spurs debate on human history.” National Geographic. National Geographic Society, October 17, 2013. Web. November 26. 2013. .