 Within informal logic, the simplest criterion for good arguments is an informal analogue of soundness. It understands a good argument to be an argument that justifies its conclusion by providing good (strong, credible, etc.) reasons for believing it. Within the argument, this implies premises which are “acceptable” and a conclusion that follows from them. We can summarize this basic criterion as T = {A,V}, where A is an account of premise acceptability, and V is an account of informal validity which determines when a conclusion follows from premises in a way that is approved of (deductively, inductively, conductively, and/or abductively, etc.). 