ABSTRACT
The approach to be followed in the present Book 2 may be described as argumentative or linguistic in that it starts from the rhetorical and literary practise of presenting collections of (usually successive) argum ents, con nected by logical laws referring to their linguistic form and independent from their contents. In view of its formal linguistic character, this approach may also be called syntactical, and the treatment of linguistic objects will use techniques which, in m athem atics, are counted as combinatorial. The combinatorial rules then describe particular collections of arguments as de ductions and derivations in a uniform manner, and the system s of such rules make up what are called logical ca lcu li. In so far, that approach can also be called algorithmic or computational - although the actual design of programs for devices, performing such computations, w ill not be discussed here.
