He vacillates in his account of hypotheticals and disjunctives. His final opinion is given (Vol. II., 370-378 -- " Hypotheticals (conjunctive and disjunctive), April 30, 1849"). "These syllogisms appear to be only modifications or corruptions of certain immediate inferences, for they have only two terms, and obtain a third proposition only by placing the general rule of inference (stating, of course, the possible alternatives), disguised, it is true, as the major premises.英文原著 · 《The Scottish Philosophy》