Aristotle, Volumen1J. Murray, 1872 - 476 páginas |
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Página 217 - Euclid's, and show by construction that its truth was known to us ; to demonstrate, for example, that the angles at the base of an isosceles triangle are equal...
Página 296 - Any facts are fitted, in themselves, to be a subject of science, which follow one another according to constant laws ; although those laws may not have been discovered, nor even be discoverable by our existing resources.
Página 282 - The business of Inductive Logic is to provide rules and models (such as the Syllogism and its rules are for ratiocination) to which if inductive arguments conform, those arguments are conclusive, and not otherwise.
Página 296 - ... imperfect; and were it perfect, might probably be of little avail in practice, since the data requisite for applying its principles to particular instances would rarely be procurable. A case may be conceived of an intermediate character between the perfection of science and this its extreme imperfection. It may happen that the greater causes, those on which the principal part of the...
Página 124 - Now that accident (ie attribute) for which we give a certain name to any body, or the accident which denominates its Subject, is commonly called the Essence thereof; as rationality is the essence of a man, whiteness of any white thing, and extension the essence of a body
Página 121 - ... pleasure ; thought, judgment, conception, and the like? Probably all these would have been placed by the Aristotelian school in the Categories of Actio and Passio ; and the relation of such of them as are active, to their objects, and of such of them as are passive, to their causes, would have been rightly so placed; but the things themselves, the feelings or states of mind, wrongly.
Página 272 - If this be actually done, the principle which we are now considering, that of the uniformity of the course of nature, will appear as the ultimate major premise of all inductions...
Página 309 - Each science has for its basis a different class of Ideas ; and the steps which constitute the progress of one science can never be made by employing the Ideas of another kind of science. No genuine advance could ever be obtained in Mechanics by applying to the subject the Ideas of Space and Time merely : — no advance in Chemistry, by the use of mere Mechanical Conceptions : — no discovery in Physiology, by referring facts to mere Chemical and Mechanical Principles.
Página 159 - I say, therefore, that generally all contingents have their necessary causes, as is shewn in the preceding chapter ; but are called contingents in respect of other events, upon which they do not depend ; as the rain, which shall be tomorrow, shall be necessary, that is, from necessary causes ; but we think and say it happens by chance, because we do not yet perceive the causes thereof, though they exist now ; for men commonly call that casual or contingent, whereof they do not perceive the necessary...
Página 301 - 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?