ecthesis


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ecthesis

the use of a thesis to state a belief, as the Ecthesis of Heracïius, for-bidding discussion of the duality of Christ’s will.
See also: Religion
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Asi pues, encontrar un sistema de validez en Aristoteles que de cuenta tanto de su silogistica no modal con ecthesis (ejemplificacion particular en casos de premisas universales), como de silogismos modales, ha requerido un trabajo notable por sus dificultades y que muchos consideran insoluble por problemas del texto mismo.
Lameer expounds Farabi's use of ecthesis, which appears in the proofs of Baroco and Bocardo, on the assumption that it operates with term-variables.
But ecthesis in the Arabic logical tradition does not always use term-variables rather than individual-variables.
This is another problem with using the thesis set down to help exposit ecthesis, viz.
As a matter of interest, regardless of how highly Avicenna thinks of Farabi's proof, he considers a different one in Pointers, which works from ecthesis (Pointers, 323-24; his views on conversion cannot be considered here).
The article is an argument that ecthesis should be read as involving individual-variables: see esp.
In the opening chapter on ecthesis, Flannery shows Alexander both offering a nuanced metalogical analysis of the use of "perceptual singulars" in ecthetic proofs of the sort explicitly deployed by Aristotle--for example, in defending the validity of conversion for the universal negative--and constructing alternative "definitional" proofs which, while avoiding resort to perceptual singulars, employ a quasi-ecthetic "hinge" around which the necessary logical manipulations can be effected.