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Updated: May 3, 2025


Such definitions, however, are always liable to be overthrown by the discovery of new objects in nature. Definitions of this kind are what logicians have had in view, when they laid down the rule, that the definition of a species should be per genus et differentiam.

When the syllogism is resolved, by all who treat of it, into an inference that what is true of a class is true of all things whatever that belong to the class; and when this is laid down by almost all professed logicians as the ultimate principle to which all reasoning owes its validity; it is clear that in the general estimation of logicians, the propositions of which reasonings are composed can be the expression of nothing but the process of dividing things into classes, and referring every thing to its proper class.

To these facts we owe the figments which have rendered the Southern school of logicians a little presuming, perhaps, and certainly very sophistical.

"You are quite right, sir," he said. "It does. And, for that reason, the demonstration is not absolute. But we must not forget, what logicians seem occasionally to overlook: that the 'undistributed middle, while it interferes with absolute proof, may be quite consistent with a degree of probability that approaches very near to certainty.

I had often had the same thought, and found infinite consolation in it; indeed, I rested in it so securely that I would trust myself with far more confidence to the poets than to the logicians.

The like has been the endeavour of critics, logicians, and even politicians: Nor have their attempts been wholly unsuccessful; though perhaps longer time, greater accuracy, and more ardent application may bring these sciences still nearer their perfection.

They have been pleased to add, that the present Government cannot, without gross inconsistency, call on Parliament to pass a statute of limitation. And why? Will the House believe it? Because the present Government has appointed two new Vice Chancellors. Really, Sir, I do not know whether the opponents of this bill shine more as logicians or as jurists.

But omitting an exact comparison of their respective faculties in speaking, yet thus much seems fit to be said; that Demosthenes, to make himself a master in rhetoric, applied all the faculties he had, natural or acquired, wholly that way; that he far surpassed in force and strength of eloquence all his contemporaries in political and judicial speaking, in grandeur and majesty all the panegyrical orators, and in accuracy and science all the logicians and rhetoricians of his day; that Cicero was highly educated, and by his diligent study became a most accomplished general scholar in all these branches, having left behind him numerous philosophical treatises of his own on Academic principles; as, indeed, even in his written speeches, both political and judicial, we see him continually trying to show his learning by the way.

In inductive reasoning we pass from individual facts to general principles; in deductive reasoning we pass from general principles to conclusions about individual facts. The distinction, however, draws less interest in recent times than formerly, and logicians of the present generation tend to doubt whether it has any vital significance.

And yet unless devotional books be written, especially by those who have as yet no church, how are we to aid one another in the uphill straggle to maintain some elements of a heavenly life? Can anything be more heartless, or more like the sneering devil they talk of, than Mr. Harrington? We know that very many religious men are bad logicians: if I am as puzzle-headed a fool as Mr.

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