On the Role of Logic in Analytic Theology
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Chapter 5: Methods of Proof for Boolean Logic
Chapter 5: Methods of Proof for Boolean Logic § 5.1 Valid inference steps Conjunction elimination Sometimes called simplification. From a conjunction, infer any of the conjuncts. • From P ∧ Q, infer P (or infer Q). Conjunction introduction Sometimes called conjunction. From a pair of sentences, infer their conjunction. • From P and Q, infer P ∧ Q. § 5.2 Proof by cases This is another valid inference step (it will form the rule of disjunction elimination in our formal deductive system and in Fitch), but it is also a powerful proof strategy. In a proof by cases, one begins with a disjunction (as a premise, or as an intermediate conclusion already proved). One then shows that a certain consequence may be deduced from each of the disjuncts taken separately. One concludes that that same sentence is a consequence of the entire disjunction. • From P ∨ Q, and from the fact that S follows from P and S also follows from Q, infer S. The general proof strategy looks like this: if you have a disjunction, then you know that at least one of the disjuncts is true—you just don’t know which one. So you consider the individual “cases” (i.e., disjuncts), one at a time. You assume the first disjunct, and then derive your conclusion from it. You repeat this process for each disjunct. So it doesn’t matter which disjunct is true—you get the same conclusion in any case. Hence you may infer that it follows from the entire disjunction. In practice, this method of proof requires the use of “subproofs”—we will take these up in the next chapter when we look at formal proofs. -
Being and Time-Less Faith: Juxtaposing Heideggerian Anxiety and Religious Experience
Open Theology 2020; 6: 15–26 Phenomenology of Religious Experience IV: Religious Experience and Description Jonathan Lyonhart* Being and Time-less Faith: Juxtaposing Heideggerian Anxiety and Religious Experience https://doi.org/10.1515/opth-2020-0003 Received October 12, 2019; accepted December 19, 2019 Abstract: In Heidegger, fear reveals the thing to be feared in a fuller way than theory can. However, anxiety is distinct from fear, for while fear is directed towards a specific thing within the world, anxiety is anxious about existence itself, disclosing the totality of Being. A similar method could be applied to faith. Arguably, faith is a mood; a feeling of trust in the divine that can be phenomenologically consistent and overwhelming. However, faith is not necessarily directed towards a specific object within the world. One cannot point and say: “God is right there!” Indeed, attempts to do so through miracles, teleology or dialectics have been roundly critiqued by the Western tradition. But then what is this mood of faith disclosing if not something within the world? Perhaps, like anxiety, faith is not revealing an object within the world, but the world as a totality. Since God—at least the God central to much of the Judeo-Christian tradition—is not a being but Being itself (or in some formulations is actually ‘beyond being’), God therefore cannot be disclosed in the world as an object but has to be disclosed as that which is transcendently beyond it. Such a conclusion does not simply flee the realm of the everyday, but derives from, and legitimates, basic descriptions of religious experience. -
LOGIC BIBLIOGRAPHY up to 2008
LOGIC BIBLIOGRAPHY up to 2008 by L. Geldsetzer © Copyright reserved Download only for personal use permitted Heinrich Heine Universität Düsseldorf 2008 II Contents 1. Introductions 1 2. Dictionaries 3 3. Course Material 4 4. Handbooks 5 5. Readers 5 6. Bibliographies 6 7. Journals 7 8. History of Logic and Foundations of Mathematics 9 a. Gerneral 9 b. Antiquity 10 c. Chinese Antiquity 11 d. Scholastics 12 e. Islamic Medieval Scholastics 12 f. Modern Times 13 g. Contemporary 13 9. Classics of Logics 15 a. Antiquity 15 b. Medieval Scholastics 17 c. Modern and Recent Times 18 d. Indian Logic, History and Classics 25 10. Topics of Logic 27 1. Analogy and Metaphor, Likelihood 27 2. Argumentation, Argument 27 3. Axiom, Axiomatics 28 4. Belief, Believing 28 5. Calculus 29 8. Commensurability, see also: Incommensurability 31 9. Computability and Decidability 31 10. Concept, Term 31 11. Construction, Constructivity 34 12. Contradiction, Inconsistence, Antinomics 35 13. Copula 35 14. Counterfactuals, Fiction, see also : Modality 35 15. Decision 35 16. Deduction 36 17. Definition 36 18. Diagram, see also: Knowledge Representation 37 19. Dialectic 37 20. Dialethism, Dialetheism, see also: Contradiction and Paracon- sistent Logic 38 21. Discovery 38 22. Dogma 39 23. Entailment, Implication 39 24. Evidence 39 25. Falsity 40 26. Fallacy 40 27. Falsification 40 III 28. Family Resemblance 41 2 9. Formalism 41 3 0. Function 42 31. Functors, Junct ors, Logical Constants or Connectives 42 32. Holism 43 33. Hypothetical Propositions, Hypotheses 44 34. Idealiz ation 44 35. Id entity 44 36. Incommensurability 45 37. Incompleteness 45 38. -
Trinity, Subordination, and Heresy: a Reply to Mark Edwards
2020 TheoLogica An International Journal for Philosophy of Religion and Philosophical Theology S. I. CONCILIAR TRINITARIANISM DOI: https://doi.org/10.14428/thl.v4i2.52323 Trinity, Subordination, and Heresy: A Reply to Mark Edwards R. T. MULLINS University of Edinburgh [email protected] Abstract: In this article, I offer some analytic reflections on Mark Edward's paper, "Is Subordinationism a Heresy?" I shall discuss the desiderata for a conciliar Trinitarian theology, the divine essence, and the different notions of subordination that Edwards identifies. Then I shall consider two arguments that certain accepted, conciliar notions of subordination lead to heretical notions of subordination. Thus raising the worry that conciliar Trinitarian theology might involve some internal incoherence between the homoousios doctrine and the subordination of the Son and Holy Spirit to the Father. Keywords: Trinity, subordination, eternal generation, analytic theology Mark Edwards has provided us with an excellent overview of the different notions of Trinitarian subordination throughout parts of church history. Some readers will be surprised to find that certain notions of subordination are affirmed in conciliar Trinitarian thought, whilst others are not. I for one greatly appreciate the clarity that Edwards brings to this issue in his essay. His essay is not intended to be historically exhaustive, but rather offers snapshots into different time periods. Edwards starts his survey with the biblical material before moving on to the debates leading up to the Council of Nicaea, and the continuation of those debates in the aftermath of the Council. After this, Edwards takes a glance at the Protestant Reformation, and then offers an interesting discussion of the Trinitarian thought of John Milton, Ralph Cudworth, and George Bull. -
On Reading the Bible As Scripture, Encountering the Church
Perichoresis Volume 18.5 (2020): 67–86 DOI: 10.2478/perc-2020-0029 ON READING THE BIBLE AS SCRIPTURE, ENCOUNTERING THE CHURCH * STEVEN NEMES Fuller Theological Seminary ABSTRACT. As an exercise in the ‘theology of disclosure’, the present essay proposes a kind of phenomenological analysis of the act of reading the Bible as Scripture with the goal of bringing to light the theoretical commitments which it implicitly demands. This sort of analysis can prove helpful for the continuing disputes among Protestants, Catholics, and Orthodox insofar as it is relevant for one of the principal points of controversy between them: namely, the rela- tionship between Scripture, Tradition, and Church as theological authorities. It proceeds by analyzing both the objective and subjective ‘poles’ of the act, and it illuminates the presence of the Church and her Tradition on both sides. The Church—i.e., the community of God’s peo- ple—is both that which is immediately encountered in the text, as well as the factor which ena- bles scriptural reading in the first place. The article terminates with an application of the in- sights of the preceding discussion to the controversy about icons. KEYWORDS: phenomenology of Scripture, Tradition, Bible, ecclesiology, icons Preliminary Remarks on the Phenomenology of Scripture The quincentenary of the Protestant Reformation invites careful reflection on persistent divisions which characterize Christian existence in the modern world. Though typically the disputes between Protestants, Catholics, and Orthodox are often addressed hermeneutically, through the careful inter- pretation of particular critical passages, there is a prior question to be an- swered, one which promises fruit for the resolution of the seemingly inter- minable exegetical debates. -
Notes on Proof Theory
Notes on Proof Theory Master 1 “Informatique”, Univ. Paris 13 Master 2 “Logique Mathématique et Fondements de l’Informatique”, Univ. Paris 7 Damiano Mazza November 2016 1Last edit: March 29, 2021 Contents 1 Propositional Classical Logic 5 1.1 Formulas and truth semantics . 5 1.2 Atomic negation . 8 2 Sequent Calculus 10 2.1 Two-sided formulation . 10 2.2 One-sided formulation . 13 3 First-order Quantification 16 3.1 Formulas and truth semantics . 16 3.2 Sequent calculus . 19 3.3 Ultrafilters . 21 4 Completeness 24 4.1 Exhaustive search . 25 4.2 The completeness proof . 30 5 Undecidability and Incompleteness 33 5.1 Informal computability . 33 5.2 Incompleteness: a road map . 35 5.3 Logical theories . 38 5.4 Arithmetical theories . 40 5.5 The incompleteness theorems . 44 6 Cut Elimination 47 7 Intuitionistic Logic 53 7.1 Sequent calculus . 55 7.2 The relationship between intuitionistic and classical logic . 60 7.3 Minimal logic . 65 8 Natural Deduction 67 8.1 Sequent presentation . 68 8.2 Natural deduction and sequent calculus . 70 8.3 Proof tree presentation . 73 8.3.1 Minimal natural deduction . 73 8.3.2 Intuitionistic natural deduction . 75 1 8.3.3 Classical natural deduction . 75 8.4 Normalization (cut-elimination in natural deduction) . 76 9 The Curry-Howard Correspondence 80 9.1 The simply typed l-calculus . 80 9.2 Product and sum types . 81 10 System F 83 10.1 Intuitionistic second-order propositional logic . 83 10.2 Polymorphic types . 84 10.3 Programming in system F ...................... 85 10.3.1 Free structures . -
Relevant and Substructural Logics
Relevant and Substructural Logics GREG RESTALL∗ PHILOSOPHY DEPARTMENT, MACQUARIE UNIVERSITY [email protected] June 23, 2001 http://www.phil.mq.edu.au/staff/grestall/ Abstract: This is a history of relevant and substructural logics, written for the Hand- book of the History and Philosophy of Logic, edited by Dov Gabbay and John Woods.1 1 Introduction Logics tend to be viewed of in one of two ways — with an eye to proofs, or with an eye to models.2 Relevant and substructural logics are no different: you can focus on notions of proof, inference rules and structural features of deduction in these logics, or you can focus on interpretations of the language in other structures. This essay is structured around the bifurcation between proofs and mod- els: The first section discusses Proof Theory of relevant and substructural log- ics, and the second covers the Model Theory of these logics. This order is a natural one for a history of relevant and substructural logics, because much of the initial work — especially in the Anderson–Belnap tradition of relevant logics — started by developing proof theory. The model theory of relevant logic came some time later. As we will see, Dunn's algebraic models [76, 77] Urquhart's operational semantics [267, 268] and Routley and Meyer's rela- tional semantics [239, 240, 241] arrived decades after the initial burst of ac- tivity from Alan Anderson and Nuel Belnap. The same goes for work on the Lambek calculus: although inspired by a very particular application in lin- guistic typing, it was developed first proof-theoretically, and only later did model theory come to the fore. -
Qvp) P :: ~~Pp :: (Pvp) ~(P → Q
TEN BASIC RULES OF INFERENCE Negation Introduction (~I – indirect proof IP) Disjunction Introduction (vI – addition ADD) Assume p p Get q & ~q ˫ p v q ˫ ~p Disjunction Elimination (vE – version of CD) Negation Elimination (~E – version of DN) p v q ~~p → p p → r Conditional Introduction (→I – conditional proof CP) q → r Assume p ˫ r Get q Biconditional Introduction (↔I – version of ME) ˫ p → q p → q Conditional Elimination (→E – modus ponens MP) q → p p → q ˫ p ↔ q p Biconditional Elimination (↔E – version of ME) ˫ q p ↔ q Conjunction Introduction (&I – conjunction CONJ) ˫ p → q p or q ˫ q → p ˫ p & q Conjunction Elimination (&E – simplification SIMP) p & q ˫ p IMPORTANT DERIVED RULES OF INFERENCE Modus Tollens (MT) Constructive Dilemma (CD) p → q p v q ~q p → r ˫ ~P q → s Hypothetical Syllogism (HS) ˫ r v s p → q Repeat (RE) q → r p ˫ p → r ˫ p Disjunctive Syllogism (DS) Contradiction (CON) p v q p ~p ~p ˫ q ˫ Any wff Absorption (ABS) Theorem Introduction (TI) p → q Introduce any tautology, e.g., ~(P & ~P) ˫ p → (p & q) EQUIVALENCES De Morgan’s Law (DM) (p → q) :: (~q→~p) ~(p & q) :: (~p v ~q) Material implication (MI) ~(p v q) :: (~p & ~q) (p → q) :: (~p v q) Commutation (COM) Material Equivalence (ME) (p v q) :: (q v p) (p ↔ q) :: [(p & q ) v (~p & ~q)] (p & q) :: (q & p) (p ↔ q) :: [(p → q ) & (q → p)] Association (ASSOC) Exportation (EXP) [p v (q v r)] :: [(p v q) v r] [(p & q) → r] :: [p → (q → r)] [p & (q & r)] :: [(p & q) & r] Tautology (TAUT) Distribution (DIST) p :: (p & p) [p & (q v r)] :: [(p & q) v (p & r)] p :: (p v p) [p v (q & r)] :: [(p v q) & (p v r)] Conditional-Biconditional Refutation Tree Rules Double Negation (DN) ~(p → q) :: (p & ~q) p :: ~~p ~(p ↔ q) :: [(p & ~q) v (~p & q)] Transposition (TRANS) CATEGORICAL SYLLOGISM RULES (e.g., Ǝx(Fx) / ˫ Fy). -
From Axioms to Rules — a Coalition of Fuzzy, Linear and Substructural Logics
From Axioms to Rules — A Coalition of Fuzzy, Linear and Substructural Logics Kazushige Terui National Institute of Informatics, Tokyo Laboratoire d’Informatique de Paris Nord (Joint work with Agata Ciabattoni and Nikolaos Galatos) Genova, 21/02/08 – p.1/?? Parties in Nonclassical Logics Modal Logics Default Logic Intermediate Logics (Padova) Basic Logic Paraconsistent Logic Linear Logic Fuzzy Logics Substructural Logics Genova, 21/02/08 – p.2/?? Parties in Nonclassical Logics Modal Logics Default Logic Intermediate Logics (Padova) Basic Logic Paraconsistent Logic Linear Logic Fuzzy Logics Substructural Logics Our aim: Fruitful coalition of the 3 parties Genova, 21/02/08 – p.2/?? Basic Requirements Substractural Logics: Algebraization ´µ Ä Î ´Äµ Genova, 21/02/08 – p.3/?? Basic Requirements Substractural Logics: Algebraization ´µ Ä Î ´Äµ Fuzzy Logics: Standard Completeness ´µ Ä Ã ´Äµ ¼½ Genova, 21/02/08 – p.3/?? Basic Requirements Substractural Logics: Algebraization ´µ Ä Î ´Äµ Fuzzy Logics: Standard Completeness ´µ Ä Ã ´Äµ ¼½ Linear Logic: Cut Elimination Genova, 21/02/08 – p.3/?? Basic Requirements Substractural Logics: Algebraization ´µ Ä Î ´Äµ Fuzzy Logics: Standard Completeness ´µ Ä Ã ´Äµ ¼½ Linear Logic: Cut Elimination A logic without cut elimination is like a car without engine (J.-Y. Girard) Genova, 21/02/08 – p.3/?? Outcome We classify axioms in Substructural and Fuzzy Logics according to the Substructural Hierarchy, which is defined based on Polarity (Linear Logic). Genova, 21/02/08 – p.4/?? Outcome We classify axioms in Substructural and Fuzzy Logics according to the Substructural Hierarchy, which is defined based on Polarity (Linear Logic). Give an automatic procedure to transform axioms up to level ¼ È È ¿ ( , in the absense of Weakening) into Hyperstructural ¿ Rules in Hypersequent Calculus (Fuzzy Logics). -
A Conversation with Jonathan Edwards and William Alston
Towards a Model of Indwelling: A Conversation with Jonathan Edwards and William Alston Ray S. Yeo Carolina Graduate School of Divinity Abstract: In this paper I attempt to provide a model for understanding the theological, psychological and metaphysical dimensions of the Spirit’s indwelling in sanctifying grace by synthesizing Jonathan Edwards’ theological psychology with William Alston’ model of indwelling. However, despite its promise, the Edwards-Alston synthesis faces substantial difficulties associated with a literal and direct union between divinity and humanity. Nevertheless, the difficulties could be avoided if we take the mediatory role of Christ’s humanity more seriously and conceive of indwelling grace as an infusion of Christ’s human unitive drive through the Holy Spirit’s abiding presence within his people. 1. Introduction Central to the thought of Jonathan Edwards is his theologically sophisticated psychology of grace or what is sometimes called his “religious psychology of the heart” (Walton 2002, 5).1 Discussion of this important subject can be found not only in his famous Treatise Concerning Religious Affections but also throughout his vast corpus of writings including his sermons and miscellanies entries. Edwards’ understanding of the psychological functioning of grace may not be entirely original; much of what he says can be found in some form in his Puritan and Protestant forbearers.2 However, his treatment of the subject is unsurpassed in the Puritan literature in terms of the level of precision, thoroughness and systematic sophistication.3 Hence, it remains one of the deepest and most fecund theological psychologies of grace in the Protestant tradition and the heart of his account comes 1 Harold Simonson (2004, 5) claims that the notion of the sense of the heart “summarizes Edwards’s whole system of thought”. -
Bunched Hypersequent Calculi for Distributive Substructural Logics
EPiC Series in Computing Volume 46, 2017, Pages 417{434 LPAR-21. 21st International Conference on Logic for Programming, Artificial Intelligence and Reasoning Bunched Hypersequent Calculi for Distributive Substructural Logics Agata Ciabattoni and Revantha Ramanayake Technische Universit¨atWien, Austria fagata,[email protected]∗ Abstract We introduce a new proof-theoretic framework which enhances the expressive power of bunched sequents by extending them with a hypersequent structure. A general cut- elimination theorem that applies to bunched hypersequent calculi satisfying general rule conditions is then proved. We adapt the methods of transforming axioms into rules to provide cutfree bunched hypersequent calculi for a large class of logics extending the dis- tributive commutative Full Lambek calculus DFLe and Bunched Implication logic BI. The methodology is then used to formulate new logics equipped with a cutfree calculus in the vicinity of Boolean BI. 1 Introduction The wide applicability of logical methods and their use in new subject areas has resulted in an explosion of new logics. The usefulness of these logics often depends on the availability of an analytic proof calculus (formal proof system), as this provides a natural starting point for investi- gating metalogical properties such as decidability, complexity, interpolation and conservativity, for developing automated deduction procedures, and for establishing semantic properties like standard completeness [26]. A calculus is analytic when every derivation (formal proof) in the calculus has the property that every formula occurring in the derivation is a subformula of the formula that is ultimately proved (i.e. the subformula property). The use of an analytic proof calculus tremendously restricts the set of possible derivations of a given statement to deriva- tions with a discernible structure (in certain cases this set may even be finite). -
What Does It Mean to Grieve the Holy Spirit (Ephesians 4:30)? 27 Joshua M
1 Spring 2019 • Volume 16, Number 1 Spring 2019 • Vol. 16, No. 1 The Baptist Center for Theology and Ministry New Orleans Baptist Theological Seminary Editor-in-Chief 2019 EDITORIAL ADVISORY BOARD Charles S. Kelley, ThD Bart Barber, PhD Executive Editor First Baptist Church of Farmersville, Texas Steve W. Lemke, PhD Rex Butler, PhD Editor & BCTM Director New Orleans Baptist Theological Seminary Adam Harwood, PhD Research Assistant Nathan Finn, PhD Hoyt Denton North Greenville University Book Review Editors Eric Hankins, PhD Archie England, PhD First Baptist Fairhope, Fairhope, Alabama Dennis Phelps, PhD Malcolm Yarnell, PhD Southwestern Baptist Theological Seminary The Baptist Center for Theology and Ministry is a research institute of New Orleans Baptist Theological Seminary. The seminary is located at 3939 Gentilly Blvd., New Orleans, LA 70126. BCTM exists to provide theological and ministerial resources to enrich and energize ministry in Baptist churches. Our goal is to bring together professor and practitioner to produce and apply these resources to Baptist life, polity, and ministry. The mission of the BCTM is to develop, preserve, and communicate the distinctive theological identity of Baptists. The Journal for Baptist Theology and Ministry is published semiannually by the Baptist Center for Theology and Ministry. Copyright ©2019 The Baptist Center for Theology and Ministry, New Orleans Baptist Theological Seminary. All Rights Reserved. This peridiocal is indexed in the ATLA Religion Database® (ATLA RDB®), http://www.atla.com. CONTACT BCTM (800) 662-8701, ext. 8074 [email protected] www.baptistcenter.com SUBMISSIONS Visit the Baptist Center website for submission guidelines. TABLE OF CONTENTS Editorial Introduction 1 Adam Harwood The Role, Purpose, and Nature of Women according to Martin Luther 2 Joe Early Jr.