Everything said of a subject is said in one of five ways. Porphyry's Isagoge — three thousand words that every educated European read for a thousand years — and the distinction between a mark that is reliable and one that is essential.
Module 2
The Five Predicables
Led by Boethius Simulacrum
The question
Seven sittings on the *Isagoge*. You establish the five as an
Outcome
The student can take any true predication and determine which of the
Sub-units
○2.1Five Ways of Saying
○2.2Genus and Species
○2.3Differentia: The Debt from Module 1
○2.4Proprium: Reliable and Not Essential
○2.5Accidens, and the Complete Sorting
○2.6Building the Tree
○2.7The Question Porphyry Would Not Answer
Practice scenarios
Is It a Sport?
A committee is deciding whether a particular activity qualifies as a
sport, and the argument has run for two meetings. One member insists it is not,
because it requires no physical exertion. Another insists it is, because it has
competitions, rankings, governing bodies and professional players. A third has
proposed a compromise definition everyone dislikes. You have been asked to help
them make progress.
Your goals
Determine, for each stated criterion, which predicable is being offered
Identify which party offers a proprium where a differentia is required
Establish whether *sport* has an essence to be found at all, or whether the
committee is doing something other than discovering one
Say what would make the compromise a definition rather than a stipulation
Advise the committee on what they can settle, and what they cannot
Course complete
You have completed every module of this course. You may now print your certificate of completion.