Troubles
Other Greek philosophers would get much more abstract. They said that basic building blocks of our world are various undefined, infinite, unitary, and impenetrable substances. For example, Anazimander (610-547 B.C.) would say that the universe was made of 'aperion', an infinite and undetermined. Still others would say this infinite was fire, like Heraclitus, or air, like Anaximines. 
Eventually, all of these ideas of a single substance being the most basic unit of our world would be demonstrated as wrong because they had one fatal flaw. The Greek philosophers found that if everything is made of the same stuff and it was uniformly everywhere then there is really no differences between the things that our senses tell are unique and therefore the world around us is an illusion. These ideas also lead to some major logic problems. (Amaldi 18) Melixes would point out the error when he was examining the idea of a vacuum and said,a "vacuum is nothing and nothing cannot exist"
With these sorts of ideas, the infinite and the impossible, logic broke down and any sort of rational explanation of the universe seemed tedious but some would try... Previous
