rhetorical discussion in form of an imaginary dialogue
• (n.) An imaginary speech or discussion between two or more; dialogue.
Di·al'o·gism noun [ Greek ..., from ...: confer French dialogisme . See Dialogue .] An imaginary speech or discussion between two or more; dialogue. Fulke. 
Inference from one premiss of a (categorical) syllogism to the disjunction of the conclusion and the negation of the other premiss is a dialogism. Or, more generally, if the inference from A and B to C is a valid inference, that from A to C ? ~B may be called a dialogism. -- A. C.