I. SYLLOGISMS CONSIDERED WITH REFERENCE TO THEIR FORM

57. Classification of Syllogisms by Form. -- Considered with reference to its form, the syllogism is: categorical; hypothetical (or conditional); conjunctive; disjunctive. The latter two may be reduced to the hypothetical syllogism. The exclusive syllogism and the dilemma, which are complex, more properly belong, the former to the categorical type, the latter to the hypothetical.