A Treatise on Logic: Or, The Laws of Pure Thought; Comprising Both the Aristotelie and Hamiltonian Analyses of Logical Forms, and Some Chapters of Applied LogicAllyn & Bacon, 1895 - 450 páginas |
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Términos y frases comunes
absolutely actually affirm the Consequent Affirmative already animal antecedent applied Aristotelic doctrine Aristotle assertion attributes Axiom called Cause class of things classification conceived Concept Conclusion connoted Consequent considered contained Contradictory Contraposition Conversion Copula Definition Demonstrative denote deny determined Disjunctive Disjunctive Syllogism distinct enounced Enthymeme equal event evidence Excluded exists explicated expressed Extension fact faculty Fallacy false Figure former Genus gism Hamilton Hence Immediate Inference individual Induction Inductive Reasoning infinite instance Intuition knowledge language Laws of Thought Logic logicians Major Premise Marks Matter meaning ment mental merely Middle Term mind mode Modus tollens Moods nature necessary Negative notion objects observed particular peculiar perception Predicate principle properly Proposition proved Pure Thought qualities Quantity rational reasoning reduced relation respect Rule sion Sir William Hamilton sophism Species Subalternation Subject sublating Sumption Syllogism tion tive true truth Universal valid whole words
Pasajes populares
Página 423 - The strength of a chain is the strength of its weakest link, the engineers tell us," said Longworth, " and it is the same with evidence.
Página 340 - MAN, being the servant and interpreter of nature, can do and understand so much and so much only as he has observed in fact or in thought of the course of nature: beyond this he neither knows anything nor can do anything.
Página 400 - The cause, then, philosophically speaking, is the sum total of the conditions, positive and negative, taken together; the whole of the contingencies of every description, which being realized, the consequent invariably follows.
Página 392 - It consists in ascribing the character of general truths to all propositions which are true in every instance that we happen to know of.
Página 283 - Coriscus (in any sense) ; But Coriscus is a man (this being one of his characteristics) ; Therefore, Socrates is not a man. The most difficult cases to be resolved are those in which giving the name of the genus, to which the subject belongs, is confounded with giving the name of its species! Thus, He who calls you a man speaks truly ; He who calls you a knave calls you a man ; Then he who calls you a knave speaks truly.
Página 392 - ... apprehension. If, then, the processes which bring these cases within the same category with the rest require that we should assume the universality of the very law which they do not at first sight appear to exemplify, is not this a petitio principii? Can we prove a proposition by an argument which takes it for granted? And if not so proved, on what evidence does it rest?
Página 297 - If a body moves, it must move either in the place where it is or in the place where it is not: but either of these is impossible: therefore it cannot move.
Página 337 - ... printing, gunpowder, and the magnet. For these three have changed the whole face and state of things throughout the world; the first in literature, the second in warfare, the third in navigation; whence have followed innumerable changes; insomuch that no empire, no sect, no star seems to have exerted greater power and influence in human affairs than these mechanical discoveries.
Página 202 - Barbara, Celarent, Darii, Ferioque, prioris; Cesare, Camestres, Festino, Baroko, secundae; Tertia, Darapti, Disamis, Datisi, Felapton, Bokardo, Ferison, habet ; Quarta insuper addit Bramantip, Camenes, Dimaris, Fesapo, Fresison.
Página 56 - The only postulate of Logic which requires an articulate enouncement is the demand, that, before dealing with a judgment or reasoning expressed in language, the import of its terms should be fully understood ; in other words, Logic postulates to be allowed to state explicitly in language what is implicitly contained in the Thought...