(4) General divisions explained.
Formal and material. Material fallacies in language and in thought.
(5) Fallacies of immediate inference.
Opposition, obversion, conversion, contraversion.
(6) Fallacies in language (also fallacies of equivocation).
Ambiguous middle—distinguished from four terms.
Amphibology.
Accent.
Composition—“all” a pitfall.
Division.