Abstract
The dialogical approach to logic is not a specific logical system; it is rather a general framework having a rule-based approach to meaning (instead of a truth-functional or a model-theoretical approach) which allows different logics to be developed, combined and compared within it. The main philosophical idea behind this framework is that meaning and rationality are constituted by argumentative interaction between epistemic subjects; it has proved particularly fruitful in history of philosophy and logic. We shall here provide a brief overview of dialogues in a more intuitive approach than what is found in the rest of the book in order to give a feeling of what the dialogical framework can do and what it is aiming at.
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Notes
- 1.
Literature pertaining to the dialogical framework also uses the terms posits and assertions to designate what we will here call statements, that is, the act of stating a proposition within a game of giving and asking for reasons; the meaning of a statement is defined by an appropriate challenge and defence, or, in other words, how reasons for this statement can be requested, what constitutes reasons for this statement and how these reasons can be provided.
- 2.
Göran Sundholm (1997, 2001) voiced some criticism against metalogical frameworks for meaning: standard model-theoretic semantics convert semantics in a formal metamathematical object for which the syntax is linked to the meaning by attributing truth-values to each sign that is uninterpreted (formula). The language thus does not express any content but is rather conceived as a system of signs speaking of the world, provided that a metalogical adequation between the signs and the world has been defined. For more on this issue, see Chap. 6, in particular Sect. 6.1.
- 3.
- 4.
This is a Wittgensteinian principle that Hintikka explicitely adopted. The reasons for linking the dialogical framework to CTT, allowing a greater explicitation of the meaning in the object language , are thus analogous to Hintikka’s vindication for the fecundity of game-theoretic semantics (GTS) in the epistemic framework for logic, semantics, and the foundations of mathematics.
- 5.
These ranks are enough for propositional logic: P can attack the two sides of a conjunction and defend the two sides of a disjunction. If the players are playing at their best (no mistakes), then 1 is enough for O: if she has a move allowing her to win, she will choose it straightaway.
- 6.
Since the players will play alternately, all of O’s moves will be uneven numbers, whereas all of P’s moves will be even numbers. There are no exceptions.
- 7.
Expressions are not listed by following the order of the moves, but by writing an attack on a new line and the defence on the same line as the corresponding attack, thus showing when a challenge is answered.
- 8.
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Rahman, S., McConaughey, Z., Klev, A., Clerbout, N. (2018). Basic Notions for Dialogical Logic. In: Immanent Reasoning or Equality in Action. Logic, Argumentation & Reasoning, vol 18. Springer, Cham. https://doi.org/10.1007/978-3-319-91149-6_3
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