Theory of Knowledge Writing Assignment “Nothing can be known with certainty” Is this statement true? Are you certain? In this essay I plan to show that nothing can be known with certainty, I will examine the truth and certainty of life and of humans, and prove that nothing can be known for certain. Sir Isaac Newton came up with many theories of time and space. Euclid said that there can be a concept of a straight line but Newton said nothing could ever travel in a straight line, see illustration below. It shows that in this spherical universe one can go straight but never for very long. If you are certain you are goi