Isagoge: history of logic: Transmission of Greek logic to the Latin West: and of Porphyry of Tyre’s Isagoge (“Introduction,” on Aristotle’s Categories), although. The Isagoge or “Introduction” to Aristotle’s Categories (text) was a the standard textbook on logic for more than a thousand years after his death. The Isagoge or Introduction by Porphyry is a commentary on Aristotle’s Categories, which became a key logical text of the Middle Ages, being.

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Aristotle Iamblichus Neoplatonism Plato Plotinus. If you are a seller for this product, would you like to suggest updates through seller support? This he applies to genus and species.

The Uses of Argument by Stephen E. Page 1 of 1 Start over Page 1 of 1. There are, however, some differences in terminology, which show Porphyry to have a certain scholarly bent that Plotinus avoids, and Porphyry is in general more interested in reconciling Aristotle with Platonism than Plotinus was. In the Platonic tradition before Porphyry, Plutarch and Plotinus already interpreted classical Greek mythology as philosophical allegories the Stoics were first to establish this practice.

It receives a two-fold division, for one kind of it is separable, but the other inseparable, e. He, however, calls himself Porphyry, which supposedly was a common name in Tyre, the city of purple, and is commonly known under that name.

Isagoge – Wikipedia

For of predicates some are predicated of one thing alone, as individuals, for instance, “Socrates,” and “this man,” and “this thing;” but others are predicated of many, as genera, species, differences, properties, and accidents, predicated in common, but not peculiarly to any one. There is considerable recent literature on Porphyry in other languages, especially Italian and French. Upon the subject generally, the reader may compare Albertus Magnus de Praedicab.


Whatever things also are predicated of genus as genus, are predicated of the species under porphryy, and whatever are predicated of difference as difference, will be also of the species formed from it.

Corrections in the scribe’s hand and in a second hand isaglge the margins and above the line.

Belongs to the lesser family, with many corruptions. The first genus, moreover, is so called, which is the principle of each man’s generation, but afterwards the number of those who are from one principle, e.

In some respects Plotinus isaglge showed such reconciliatory attitudes but Porphyry takes this trend much further.


Porphyry was a prolific author who wrote about a whole range of topics. Porphyry’s interpretation of the Categories is, however, not free from ontological commitments.

Porphyry’s discussion of accident sparked a long-running debate on the application of accident and essence. As philosophers reduced all things under ten porphhyry natures, as grammarians also, with respect to eight words, so Porphyry has comprehended every significant word, except such as are significant of individuals, under five terms.

Greek manuscripts Latin manuscripts Oriental manuscripts The Isagoge was composed by Porphyry in Sicily during the yearsand sent to Chrysaorium, according to all the ancient commentators Ammonius, Elias, and David.

Written by Arethas of Caesarea in a distinctive hand. Besides, genera are prior to the differences under them, wherefore they subvert them, but are not co-subverted with them. I think having one monograph covering this material as a textbook would bring helpful order to the mass of scholarship that exists.


There seems to be a certain isagogw in Porphyry’s and Plotinus’ emphasis here, however. The Introduction to philosophy written by Porphyry at the end of the second century AD is the most successful work of its kind ever to have been published. The other 2 Florence mss mentioned are both copies of Athanasius of Balad’s translation.

Porphyry (Stanford Encyclopedia of Philosophy)

Explore the Home Gift Guide. Since then, there are three species of difference considered, some indeed separable, but others inseparable, again, of the inseparable, some are per se, but others accidental, moreover of differences per se, some are those according to oorphyry we divide genera into species, but others according to which the things divided become specific: This is revealed e.

The evidence for this, however, is not beyond dispute.

The Homeric Questionsedited and translated jsagoge R. Wherefore specific differences will be such as produce another species, and which are assumed in explaining the very nature of a thing: The isaggoe heads of predicables therefore, taken from this Isagoge, which was written in the third century, are an addition to the Aristotelian Logic, in part of which, the Topics, the doctrine laid down differs from that enunciated here, in several points, as Porphyry’s view also differs from that of Aldrich.

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