PHIL 2100 Lecture Notes - Lecture 13: Categorical Logic, Venn Diagram, Informal Logic
27 Apr 2016
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An argument is a connected series of statements intended to establish a proposition. The connectedness is such that some of the statements (or premises) serve as reasons for one statement which is the conclusion. There are two main considerations in determining whether we should accept or reject an argument: if you accept the premises you must accept the conclusion, the premises must be acceptable and properly connected to the conclusion. If the connection between the premises and the conclusion is broken you must reject the argument. Therefore the connection must be valid, relevant and. Focus on acceptability of premises and relevance and sufficiency which is informal logic. Arguments consist of statements: a statement is a sentence that expresses something and can be judged true or false. That something (claim or assertion) that a statement expresses is called a proposition. Propositional logic: deals with entire statements or propositions: 1. ) Either the statement is dead or alive either p or q: 2. )
