Adina Moshavi, «Two Types of Argumentation Involving Rhetorical Questions in Biblical Hebrew Dialogue», Vol. 90 (2009) 32-46
Rhetorical questions (henceforth RQs) often express a premise in a logical argument. Although the use of RQs in arguments has been widely noted, the modes of reasoning underlying the arguments have not received sufficient attention. The present study investigates argumentative RQs in the prose dialogue in Genesis through Kings in the light of pragmatic argumentation theory. Two logical forms, modus tollens and denying the antecedent, are identified as accounting for the majority of arguments expressed by RQs. The first type is generally intended to deductively establish its conclusion, while the second, formally invalid form is used presumptively to challenge the addressee to justify his position. There is also a presumptive variety of the modus tollens argument, which is based on a subjective premise. Both modus tollens and denying the antecedent have similar linguistic representations and can be effective means of refusing directives.
42 Adina Moshavi
in the context of their conversation with the official, his questions regarding
the family seemed to be an innocent inquiry. Another example is Moses’
argument against his appointment as emissary to Pharaoh (Exod 6,12): “The
Israelites would not listen to me; how should Pharaoh listen to me, when I
have impeded speech?†Since the implied premise “Pharaoh will not listen
to me†is debatable, Moses backs up the premise by a rmwjw lq (a fortiori)
argument, “The Israelites would not listen to meâ€, in addition to citing his
speech impediment (48).
5. Denying the antecedent
Reconstruction as modus tollens is problematic for many arguments
superficially resembling the ones discussed in the previous section. In Jud
14,3, for example, Samson’s parents reply to his demand that they take him
a Philistine wife: “Is there no woman among the daughters of your own
kinsmen and among all our people, that you go to take a wife from the
uncircumcised Philistines?†If we reconstruct the first premise according to
the modus tollens form, the complete argument is as follows:
Premise 1: If you are justified in going to take a Philistine wife,
then there are no wives to be found among your own
people.
Premise 2: There are wives to be found among your own people.
Conclusion: You should not go to take a Philistine wife.
This argument, however, would make no sense to Samson, who clearly
does not accept the first premise, i.e., that he is justified in seeking a
Philistine wife only in the event that there are no Israelite women to marry.
It would be pointless for the speaker to present an argument that he knows
the addressee will reject out of hand.
Van Selms’ reductio ad absurdum interpretation of such arguments (see
above) is apparently built on the assumption that the arguments most
closely resemble modus tollens. Following van Selms’ approach, the
argument would be reconstructed as follows: “From the fact that you are
going to take a Philistine wife, one could almost conclude that there are no
eligible Israelite women. Since this is obviously not true, your conduct is
not justified.†According to van Selms, the speaker is not claiming that the
conclusion actually follows from the premise, but that one “could almostâ€
conclude it, or that one “could†conclude it. But how would such an
argument be persuasive to an addressee who certainly would not conclude
anything of the kind?
I propose that arguments of this type should be understood as denying
the antecedent, not modus tollens. Denying the antecedent is one of the
traditional formal fallacies, taking the following form:
Premise 1: If B then A.
Premise 2: Not B.
Conclusion: Not A.
(48) See also the similar Exod 6,30. Additional modus tollens arguments that are
accompanied by supplementary evidence include Num 22,38 and 1 Sam 25,10.