Single, double.
(3) Polysyllogism.
Prosyllogism, episyllogism.
(4) Sorites.
Progressive, regressive.
Two rules of each.
(5) Irregular Arguments.
Quantitative, plurative.
7. SUMMARY.
(1) An enthymeme is a syllogism in which one of the three propositions is omitted. Suppressing the major premise gives an enthymeme of the first order; omitting the minor gives one of the second order; while omitting the conclusion gives one of the third order.