The elements of deductive logic |
From inside the book
Results 1-5 of 20
Page 37
... genus ( a term which will be immediately explained ) with some attribute which is peculiar to the term in question ( called by Aristotle an dior or ' peculiarity ' ) as ' A triangle is a rectilineal figure the sum of whose angles is ...
... genus ( a term which will be immediately explained ) with some attribute which is peculiar to the term in question ( called by Aristotle an dior or ' peculiarity ' ) as ' A triangle is a rectilineal figure the sum of whose angles is ...
Page 38
... genus , but the attributive ' having the sum of its angles equal to two right angles ' cannot be regarded as a differentia , for it is not connoted by the term ' tri- angle , ' but requires to be proved of it ; at the same time it is an ...
... genus , but the attributive ' having the sum of its angles equal to two right angles ' cannot be regarded as a differentia , for it is not connoted by the term ' tri- angle , ' but requires to be proved of it ; at the same time it is an ...
Page 39
... genus . It can only be a synonym , or a singular or collective term designating the individual or the collective group . As in- stances of these propositions we may give the following : ' Cephas is Peter , ' ' Socrates is the son of ...
... genus . It can only be a synonym , or a singular or collective term designating the individual or the collective group . As in- stances of these propositions we may give the following : ' Cephas is Peter , ' ' Socrates is the son of ...
Page 42
... genus , or as species to species , as e.g. ' Some men are poets , ' or ' Some poets are philosophers . ' The latter relation is that of two groups , which have some members in common - overlapping species , as they have been called ...
... genus , or as species to species , as e.g. ' Some men are poets , ' or ' Some poets are philosophers . ' The latter relation is that of two groups , which have some members in common - overlapping species , as they have been called ...
Page 43
... genus , still denote no individuals in common , -in an O proposition , that of overlapping species . Thus we should be far more likely to derive information from such propositions as these , ' No sandstone is limestone , ' ' Some ...
... genus , still denote no individuals in common , -in an O proposition , that of overlapping species . Thus we should be far more likely to derive information from such propositions as these , ' No sandstone is limestone , ' ' Some ...
Other editions - View all
Common terms and phrases
abstract terms act or operation affirmed or denied ambiguity analysis argument Aristotle asserted attribute or group called CHAPTER collective term College common terms conclusion conjunctive consequently copula Crown 8vo deductive inference defined definition differentia disjunctive disjunctive proposition disjunctive syllogism distinction distinguish distributed distribution of terms division Edited employed English Euathlus fallacy formerly Fellow fourteenth legion genus gism group of attributes group of individuals human ignoratio elenchi immediate inference inasmuch incorrect thoughts induction instances language legitimate Logic logicians major premiss meaning minor Molière moods negative Note noticed older logicians ordinary Oriel College Oxford P. G. TAIT particular premiss permutation Philosophy poets predicate probably proposition reasoning rectilineal figure regarded relation Roman senate rules saw yesterday shews simply singular and collective singular or collective singular term Socrates species student subaltern subject and predicate substantive syllogism tenth legion term expressive tion true universal verb virtue
Popular passages
Page 115 - If A is B, C is D ; and if E is F, G is H ; But either C is not D, or G is not H ; Therefore either A is not B, or E is not F.
Page 137 - to allow every man an unbounded freedom of speech must always be, on the whole, advantageous to the State ; for it is highly conducive to the interests of the Community, that each individual should enjoy a liberty perfectly unlimited, of expressing his sentiments.
Page 62 - Thus, for" example, he to whom the geometrical proposition, that the angles of a triangle are together equal to two right angles...
Page 158 - In a higher world it is otherwise; but here below to live is to change, and to be perfect is to have changed often.
Page 143 - A servant who was roasting a stork for his master was prevailed upon by his sweetheart to cut off a leg for her to eat. When the bird came upon table, the master desired to know what was become of the other leg. The man answered that storks had never more than one leg.
Page 5 - Logic is both a science and an art ; it is a science inasmuch as, by analyzing the elements, principles, and structure of arguments, it teaches us how to discover their truth or detect their fallacies, and point out the sources of such errors. It is an art, inasmuch as it teaches...
Page 99 - Barbara, Celarent, Darii, Ferioque, prioris; Cesare, Camestres, Festino, Baroko, secundae; Tertia, Darapti, Disamis, Datisi, Felapton, Bokardo, Ferison, habet ; Quarta insuper addit Bramantip, Camenes, Dimaris, Fesapo, Fresison.
Page 132 - ... which, as already noticed, is one case of the fallacy of ambiguous terms. Thus to argue, because there are certain points of resemblance between the development of the individual and the development of the race, that, therefore, since the individual dies, the race will probably die also, or, because there are certain points of resemblance between the earth and the other planets, that, therefore, the other planets are certainly, or very probably, inhabited, would both be instances of false analogy,...