A dialectical syllogism uses premises either commonly accepted within a group or conceded by the opponent. Their acceptance does not independently certify their truth.
Commonly accepted premises may arise from perceived welfare, custom, temperament, and specialist practice. Conceded premises arise from particular admissions in debate. Dialectic seeks to bind the opponent or defend a view while still requiring valid reasoning.
The next section introduces rhetorical syllogism, which uses premises aimed at yielding reasonable belief and persuading an audience.