deductively valid
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applied logic — Introduction the study of the practical art of right reasoning. The formalism (formal logic) and theoretical results of pure logic can be clothed with meanings derived from a variety of sources within philosophy as well as from other… … Universalium
formal logic — the branch of logic concerned exclusively with the principles of deductive reasoning and with the form rather than the content of propositions. [1855 60] * * * Introduction the abstract study of propositions, statements, or assertively used … Universalium
Descartes: methodology — Stephen Gaukroger INTRODUCTION The seventeenth century is often referred to as the century of the Scientific Revolution, a time of fundamental scientific change in which traditional theories were either replaced by new ones or radically… … History of philosophy
fallacy — /fal euh see/, n., pl. fallacies. 1. a deceptive, misleading, or false notion, belief, etc.: That the world is flat was at one time a popular fallacy. 2. a misleading or unsound argument. 3. deceptive, misleading, or false nature; erroneousness.… … Universalium
Aristotle’s logic and metaphysics — Alan Code PART 1: LOGICAL WORKS OVERVIEW OF ARISTOTLE’S LOGIC The Aristotelian logical works are referred to collectively using the Greek term ‘Organon’. This is a reflection of the idea that logic is a tool or instrument of, though not… … History of philosophy
Validity — The term validity (also called logical truth, analytic truth, or necessary truth) as it occurs in logic refers generally to a property of particular statements and deductive arguments. Although validity and logical truth are synonymous concepts,… … Wikipedia
Inductive reasoning — Induction or inductive reasoning, sometimes called inductive logic, is the process of reasoning in which the premises of an argument are believed to support the conclusion but do not entail it; i.e. they do not ensure its truth. Induction is a… … Wikipedia
Logic — For other uses, see Logic (disambiguation). Philosophy … Wikipedia
Theodicy — (IPAEng|θiːˈɒdɪsi) (adjectival form theodicean) is a specific branch of theology and philosophy that attempts to reconcile the existence of evil or suffering in the world with the belief in an omniscient, omnipotent, and omnibenevolent God, i.e … Wikipedia
Peter Singer — Infobox Philosopher region = Western Philosophy era = Contemporary philosophy color = #B0C4DE image caption = name = Peter Singer birth = birth date and age|1946|7|6 death = school tradition = Analytic· Utilitarianism main interests = Ethics… … Wikipedia
Logical consequence — Therefore redirects here. For the symbol, see therefore sign. Logical consequence is a fundamental concept in logic. It is the relation that holds between a set of sentences (or propositions) and a sentence (proposition) when the former entails… … Wikipedia
