The Pre-Socratic Greek philosophers were active before Socrates or contemporaneously, but expounding knowledge developed earlier. The popularity of the term originates with Hermann Diels' work Die Fragmente der Vorsokratiker (The Fragments of the Pre-Socratics, 1903). It is sometimes difficult to determine the actual line of argument some pre-Socratics used in supporting their particular views. While most of them produced significant texts, none of the texts have survived in complete form. All w… (More on Pre-socratics)