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Essay Towards an Easy and Useful System of Logic (Classic Reprint)
Keine Leseprobe verfügbar - 2018
An Essay Towards an Easy and Useful System of Logic (1834)
Keine Leseprobe verfügbar - 2009
acquainted affirmed analogy analysis Archbishop Whately argument Argumentum arise attention become Blakey branches of knowledge CHAPTER circumstances clusion common comprehend conclusion connected with human connexion consideration considered constitution definition degree of evidence departments of knowledge dispute employed endeavour error examination fact feelings founded fruitful source gisms give habit human nature human testimony ideas importance influence inquiry instruments intellectual intimately ject judgment kind and degree language ledge logicians mankind mathematical matter ment mental philosophy middle term mind minute mode Moral Philosophy moral science natural philosophy natural theology neral notice notions objects observation operations opinion ourselves perceive person philosophy of mind political premises principles process of reasoning proposition prove question quibbler rational reader reasoning powers relation religious remarks resemblance ROBERT BLAKEY rules science of logic sion Sophisms speculative subjects connected syllogism system of logic theory thing tion topics treatises on logic truth ture various verbal words writers
Seite 104 - He and his agency are altogether good and holy, and that He is the fountain of all holiness. It would be strange arguing, indeed, because men never commit sin, but only when God leaves them to themselves, and necessarily sin, when he does so, that therefore their sin is not from themselves...
Seite 122 - And Dr. Brown defines anger to be " that emotion of instant displeasure, which arises from the feeling of injury done or the discovery of injury intended, or, in many cases, from the discovery of the mere omission of good offices to which we conceived ourselves entitled, though this very omission may, of itself, be regarded as a species of injury.
Seite 98 - This luminary not only acts by its attraction upon all these globes, and compels them to move around him, but imparts to them both light and heat ; his benign influence gives birth to the animals and plants which cover the surface of the earth, and analogy induces us to believe, that it produces similar effects on the planets ; for, it is not natural to suppose that matter, of which we see the fecundity develop itself in such various ways, should be sterile upon a planet so large as Jupiter, which,...
Seite 143 - ... figure : or it may be the predicate of both premises, and then the syllogism is of the second figure; or it may be the subject of both, which makes a syllogism of the third figure •; or it may be the predicate of the major proposition, and the subject of the minor, which makes the fourth figure. Aristotle takes no notice of the fourth figure. It was added by the famous Galen, and is often called the Galenical figure. There is another division of syllogisms according to their modes. The mode...
Seite 142 - ... are in general called the extremes; and that the intermediate idea, by means of which the relation is traced, viz. a creature possessed of reason and liberty, takes the name of the middle term.
Seite 157 - ... means, to parse every sentence we utter. The chemist (to pursue the illustration) keeps by him his tests and his method of analysis, to be employed when any substance is offered to his notice, the composition of which has not been ascertained, or in which adulteration is suspected. Now a fallacy may aptly be compared to some adulterated compound; " it " consists of an ingenious mixture of truth and " falsehood, so entangled,—so intimately blend...
Seite 10 - ... to the health of your mind. Do not exercise any one faculty unduly. Do not indulge the imagination. Read no novels, and but little poetry. Do not overload the memory. Think as well as read ; but do not think intensely on any one subject ; the reasoning powers then become distracted and enfeebled. "A quickness of mental perception, a lively and vigorous imagination, and a ready and retentive memory, are highly useful and ornamental qualities ; but they are individually limited in their beneficial...
Seite 164 - The habit of committing our thoughts to writing is a powerful means of expanding the mind, and producing a logical and systematic arrangement of our views and opinions. It is this which gives the writer a vast superiority as to the accuracy and extent of his conceptions over the mere talker. No one can ever hope to know the principles of any art or science thoroughly who does not write as well as read upon the subject.
Seite 104 - High, but, on the contrary, arises from the withholding of his action and energy, and under certain circumstances necessarily follows on the want of his influence ; this is no argument that he is sinful, or his operation evil...
Seite 99 - Earth, could not, according to all appearance, live upon the other planets; but ought there not to be a diversity of organization suited to the various temperatures of the globes of this universe? If the difference of elements and climates alone causes such variety in the productions of the Earth, how infinitely diversified must be the productions of the planets and their satellites? The most active imagination cannot form any just idea of them, but still their existence is, at least, extremely probable.