A treatise on logic, or, The laws of pure thoughtSever & Francis, 1864 |
From inside the book
Արդյունքներ 70–ի 1-ից 5-ը:
Էջ 40
... extension of any science . It ana- lyzes the Laws of Thought ; but , as these Laws are neces- sary and universal , that is , as they exist in full force even in the humblest and least - instructed intellect , it does not profess to ...
... extension of any science . It ana- lyzes the Laws of Thought ; but , as these Laws are neces- sary and universal , that is , as they exist in full force even in the humblest and least - instructed intellect , it does not profess to ...
Էջ 46
... extend the faculty of reasoning , than a general acquaintance with the rules and language of Logic , —an advantage extending in- deed to every department of knowledge , but more especially of importance to those professions which are ...
... extend the faculty of reasoning , than a general acquaintance with the rules and language of Logic , —an advantage extending in- deed to every department of knowledge , but more especially of importance to those professions which are ...
Էջ 55
... extension ; and therefore , when we affirm that body is extended , the Judgment carries its own reason or justification along with it . But in synthetic Thought , as when we say that matter is compressible , we see no reason in the ...
... extension ; and therefore , when we affirm that body is extended , the Judgment carries its own reason or justification along with it . But in synthetic Thought , as when we say that matter is compressible , we see no reason in the ...
Էջ 66
... Extension . Thus , the Intension of bird is a winged , feathered , vertebrated , biped , animal ; in its Extension are contained all individual birds and classes of birds , as eagles , vultures , 66 THE DOCTRINE OF CONCEPTS .
... Extension . Thus , the Intension of bird is a winged , feathered , vertebrated , biped , animal ; in its Extension are contained all individual birds and classes of birds , as eagles , vultures , 66 THE DOCTRINE OF CONCEPTS .
Էջ 67
... Extension ; the plurality of Marks connoted by the Concept form a Metaphysical whole , or the whole of Intension . This distinction of Quantity has been expressed by Lo- gicians in various ways , which are here enumerated for ...
... Extension ; the plurality of Marks connoted by the Concept form a Metaphysical whole , or the whole of Intension . This distinction of Quantity has been expressed by Lo- gicians in various ways , which are here enumerated for ...
Այլ խմբագրություններ - View all
A Treatise on Logic, Or, The Laws of Pure Thought: Comprising Both the ... Francis Bowen Ամբողջությամբ դիտվող - 1866 |
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 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 perception Predicate principle properly Proposition proved Pure Thought qualities Quantity rational reasoning reduced relation respect Rules sion Sir William Hamilton sophism Species Subalternation Subject sublating Sumption Syllogism tion tive true truth Universal valid whole words
Սիրված հատվածներ
Էջ 400 - 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.
Էջ 367 - As if we could not reason, and have knowledge about particulars: whereas, in truth, the matter rightly considered, the immediate object of all our reasoning and knowledge is nothing but particulars. Every man's reasoning and knowledge is only about the ideas existing in his own mind, which are truly, every one of them...
Էջ 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.
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 283 - 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.
Էջ 297 - Englishmen or not-Englishmen,' to the exclusion of the third possibility of a mixed force, so it is false to say, ' Every body must move in the place where it is, or in the place where it is not,' to the exclusion of the third possibility of moving partly in the one and partly in the other.
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 175 - In as far as two notions (notions proper or individuals), either both agree, or one agreeing, the other does not, with a common third notion ; in so far, these notions do or do not agree with each other.
Էջ 305 - objections" against various parts of Scripture ; to some of which no satisfactory answer can be given ; and the incautious hearer is apt, while his attention is fixed on these, to forget that there are infinitely more, and stronger objections against the supposition that the Christian Religion is of human origin ; and that where we cannot answer all objections, we are bound in reason and in candour to adopt the hypothesis which labours under the least.
Էջ 265 - Axiom, as has been shown (page 54), 13 lirectly explicated into the two Laws, — 1. That to affirm the Reason or the Condition is also to affirm the Consequent ; and, 2. That to deny the Consequent is also to deny the Reason. A. ratione ad rationatum, a negatione rationati ad negationem rationis, valet consequentia. The single Premise affirming that this relation of Reason and Consequent exists between the Judgments which are its two parts, this Axiom compels us to infer immediately, or without...