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 LogicSever and Francis, 1864 - 450 էջ |
From inside the book
Արդյունքներ 67–ի 1-ից 5-ը:
Էջ 9
... possible , class or plurality of things . This may be illustrated by the description which a zoölo- gist would give of a newly discovered animal , that was too unlike those formerly known to be included in the same species with any of ...
... possible , class or plurality of things . This may be illustrated by the description which a zoölo- gist would give of a newly discovered animal , that was too unlike those formerly known to be included in the same species with any of ...
Էջ 23
... possible to succeed unless every foot- nay , almost every inch in our progress be secured by an arch of masonry , before we attempt the excavation of another . Now , lan- guage is to the mind precisely what the arch is to the tun- nel ...
... possible to succeed unless every foot- nay , almost every inch in our progress be secured by an arch of masonry , before we attempt the excavation of another . Now , lan- guage is to the mind precisely what the arch is to the tun- nel ...
Էջ 26
... possible absurdity . Take , for instance , the following stanza , which occurs in the " Song by a Person of Quality , " written by Pope to ridicule this very class of blunders , as frequently committed by people of fashion in their ...
... possible absurdity . Take , for instance , the following stanza , which occurs in the " Song by a Person of Quality , " written by Pope to ridicule this very class of blunders , as frequently committed by people of fashion in their ...
Էջ 32
... possible fig- ures of the same general character . As Hamilton remarks : " The objects ( the Matter ) of thought are infinite ; no one science can embrace them all , and therefore to suppose Logic conversant about the Matter of thought ...
... possible fig- ures of the same general character . As Hamilton remarks : " The objects ( the Matter ) of thought are infinite ; no one science can embrace them all , and therefore to suppose Logic conversant about the Matter of thought ...
Էջ 34
... possible , is a purely de- monstrative science , like algebra or geometry . It treats of those arguments only which are certain and irrefutable ; or if it indirectly , considers some of those forms which come short of perfect ...
... possible , is a purely de- monstrative science , like algebra or geometry . It treats of those arguments only which are certain and irrefutable ; or if it indirectly , considers some of those forms which come short of perfect ...
Այլ խմբագրություններ - View all
A Treatise on Logic: Or, The Laws of Pure Thought; Comprising Both the ... Francis Bowen Ամբողջությամբ դիտվող - 1864 |
A Treatise on Logic: Or, The Laws of Pure Thought; Comprising Both the ... Francis Bowen Ամբողջությամբ դիտվող - 1895 |
Common terms and phrases
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 Convertend 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 Intension Intuition knowledge language Laws of Thought Logic logicians Major Premise Marks Matter meaning ment merely Middle Term mind mode Modus tollens Moods nature necessary Negative not-X notion objects observed particular peculiar Predicate principle properly Proposition proved Pure Thought qualities Quantity rational reasoning reduced relation respect Rule sion Sir William Hamilton sophism Species Subject sublating Sumption Syllogism tion tive triangle true truth Universal valid whole words
Սիրված հատվածներ
Էջ 230 - All men are mortal: that the general principle, instead of being given as evidence of the particular case cannot itself be taken for true without exception, until every shadow of doubt which could affect any case comprised with it, is dispelled by evidence aliunde; and then what remains for the syllogism to prove?
Էջ 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.
Էջ 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...
Էջ 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.
Էջ 287 - 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.
Էջ 180 - An argument thus stated regularly, and at full length, is called a syllogism; which therefore is evidently not a peculiar kind of argument, but only a peculiar form of expression, in which every argument may be stated.
Էջ 23 - process of tunnelling, of tunnelling through a sand-bank. " In this operation it is impossible to succeed, unless " every foot, nay almost every inch in our progress, be " secured by an arch of masonry, before we attempt the " excavation of another. Now, language is to the mind " precisely what the arch is to the tunnel.
Էջ 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.
Էջ 150 - Mathematics. so denominated, and thought proper, we have seen, is the cognition of one object of thought by another, in or under which it is mentally included ; in other words, thought is the knowledge of a thing through a concept or general notion, or of one notion through another.
Էջ 22 - A country may be overrun by an armed host, but it is only conquered by the establishment of fortresses. Words are the fortresses of thought. They enable us to realize our dominion over what we have already overrun in thought; to make every intellectual conquest the basis of operations for others still beyond.