The Aristotelian Rhetorical System
V. Premises [legetai] of enthymemes
Premises are either necessarily true vs. usually true
Premises are derived from probabilities [eikota] and signs [sêmeia]
- eikota are seemingly or usually true
- sêmeia are necessary [tekmêria] provided they are syllogistically valid
- validity is determined by proper relation between the universal and the particular