A Treatise on Logic, Or, The Laws of Pure Thought: Comprising Both the Aristotelic and Hamiltonian Analyses of Logical Forms, and Some Chapters of Applied LogicJ. Allyn, 1872 - 450 páginas |
Términos y frases comunes
actually affirm the Consequent Affirmative already animal antecedent appear applied Aristotelic doctrine assertion attributes Axiom called Cause class of things classification conceived Concept Conclusion connoted Consequent considered contained Contradictory Contraposition Conversion Copula Definition denote deny determined Disjunctive Disjunctive Syllogism distinct distributed enounced Enthymeme equal event evidence Excluded exists explicated expressed Extension fact faculty Fallacy false 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 Mediate Inference ment merely Middle Term mind mode Modus tollens Moods nature necessary Negative notion objects observed particular peculiar Predicate principle properly Proposition proved Pure Thought qualities Quantity reasoning reduced relation respect Rule sion Sir William Hamilton sophism Species Subalternation Subject sublating Subsumption Sumption Syllogism three Judgments tion tive true truth Universal valid whole words
Pasajes populares
Página 315 - ... 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 318 - 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 378 - Cause 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 208 - When we say, All men are mortal, Socrates is a man, therefore Socrates is mortal; it is unanswerably urged by the adversaries of the syllogistic theory, that the proposition, Socrates is mortal...
Página 178 - To vital spirits aspire, to animal, To intellectual ; give both life and sense, Fancy and understanding; whence the Soul Reason receives, and Reason is her being, Discursive, or Intuitive: Discourse Is of test yours, the latter most is ours, 489 Differing but in degree, of kind the same.
Página 24 - ... in which, though a particular quantity be marked by each letter, yet to proceed right it is not requisite that in every step each letter suggest to your thoughts that particular quantity it was appointed to stand for.
Página 261 - He who calls you a man speaks truly: he who calls you a fool, calls you a man: therefore he who calls you a fool speaks truly.
Página 265 - I have deduced a histori-theo-physi-logical account of zeal, showing how it first proceeded from a notion into a word, and thence, in a hot summer, ripened into a tangible substance. This work, containing three large volumes in folio, I design very shortly to publish by the modern way of subscription, not doubting but the nobility and gentry of the land will give me all possible encouragement; having had already such a taste of what I am able to perform.
Página 24 - And a little attention will discover that it is not necessary (even in the strictest reasonings) that significant names which stand for ideas should, every time they are used, excite in the understanding the ideas they are made to stand for : in reading and discoursing, names being for the most part used as letters are in Algebra...
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, all that is implicitly contained in the thought.