The four arts studied so far differ most clearly in what kinds of premises they use and what response they aim to produce.
ArtPremisesAim
DemonstrationCertain judgmentsCertainty
DialecticCommon/conceded claimsBind an opponent or defend a view
RhetoricAccepted/probable claimsPersuasion
PoetryImaginative premisesAttraction or aversion
The same topic can be treated by four methods, but the resulting evidential strength is not identical. Sophistry, the fifth art, will follow.