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Truth Value Solver: A Software for Calculating Truth Value with
Truth Value Solver: A Software for Calculating Truth Value with

... [4] Li, X., Liu, B., Hybrid logic and uncertain logic, Journal of Uncertain Systems, vol.3, no.2, 83-94, 2009. [5] Liu, B., Uncertainty Theory, 2nd ed., Springer-Verlag, Berlin, 2007. [6] Liu, B., Uncertainty Theory, 3nd ed., http://orsc.edu.cn/liu/ut.pdf. [7] Liu, B., Some research problems in unce ...
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... Logical implication and the material conditional are both associated with an operation on two logical values, typically the values of two propositions, that produces a value of false just in the singular case the first operand is true and the second operand is false. The truth table associated with ...
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... Second, then, proponents of the proof-theoretic approach can say that a conclusion φ is a logical consequence of a set of premises Γ IFF there is a proof of φ from the members of Γ in some system (of a certain sort) or other. ...
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... obvious, well-proven fact about men (their speaking ability) and argued that machines did not have this ability. It’s not obvious that he established his point about machines - for it’s not obvious that machines must fail where it is indeed obvious that men succeed. And, as we saw, La Mettrie, for o ...
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... this book, but some familiarity with proving things will be required. In fact, you don’t need to know very much mathematics at all to follow this text. So if you are a philosopher or a computer scientist, you should not find any of the core arguments beyond your grasp. You do, however, have to work a ...
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... By the completeness of L noninterderivable and give rise to distinct and n . This is in general not so for theories. An example is the theory axiomatized by p on the one hand, and the theory T axiomatized by m p for each m, on the other. The sets p and T are the same, consisting of all nodes that to ...
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The Foundations: Logic and Proofs - UTH e

... Two compound propositions p and q are logically equivalent if p↔q is a tautology. We write this as p⇔q or as p≡q where p and q are compound propositions. Two compound propositions p and q are equivalent if and only if the columns in a truth table giving their truth values agree. This truth table sho ...
Introduction to Logic
Introduction to Logic

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Axiom

An axiom or postulate is a premise or starting point of reasoning. As classically conceived, an axiom is a premise so evident as to be accepted as true without controversy.The word comes from the Greek axíōma (ἀξίωμα) 'that which is thought worthy or fit' or 'that which commends itself as evident.' As used in modern logic, an axiom is simply a premise or starting point for reasoning. What it means for an axiom, or any mathematical statement, to be ""true"" is a central question in the philosophy of mathematics, with modern mathematicians holding a multitude of different opinions.In mathematics, the term axiom is used in two related but distinguishable senses: ""logical axioms"" and ""non-logical axioms"". Logical axioms are usually statements that are taken to be true within the system of logic they define (e.g., (A and B) implies A), while non-logical axioms (e.g., a + b = b + a) are actually substantive assertions about the elements of the domain of a specific mathematical theory (such as arithmetic). When used in the latter sense, ""axiom,"" ""postulate"", and ""assumption"" may be used interchangeably. In general, a non-logical axiom is not a self-evident truth, but rather a formal logical expression used in deduction to build a mathematical theory. As modern mathematics admits multiple, equally ""true"" systems of logic, precisely the same thing must be said for logical axioms - they both define and are specific to the particular system of logic that is being invoked. To axiomatize a system of knowledge is to show that its claims can be derived from a small, well-understood set of sentences (the axioms). There are typically multiple ways to axiomatize a given mathematical domain.In both senses, an axiom is any mathematical statement that serves as a starting point from which other statements are logically derived. Within the system they define, axioms (unless redundant) cannot be derived by principles of deduction, nor are they demonstrable by mathematical proofs, simply because they are starting points; there is nothing else from which they logically follow otherwise they would be classified as theorems. However, an axiom in one system may be a theorem in another, and vice versa.
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