PHL100Y1 Lecture Notes - Lecture 2: Logical Form, Ancient Greek Philosophy, Pre-Socratic Philosophy
Document Summary
Philosophy is the opposite of religion when it comes to morals and values. Terminology to remember - statements can be true or false but not valid or invalid. Arguments can be valid, sound, unsound, invalid however it is never true or false. An argument form is valid if and only if whenever the premises are all true, then conclusion is true. An argument is valid if its argument form is valid. For a sound argument, an argument is sound if and only if it is valid and all its premises are true. In other words: a premise is an assumption that something is true. In logic, an argument requires a set of (at least) two declarative sentences (or propositions) known as the premises or premisses along with another declarative sentence (or. Pre-scienti c explanations used to just tell a story. no factual content. Some philosophers say they obtain their claims/theories/scienti c explanations either by experience or just thinking.
