If the respondent evaluates an irrelevant proposition on the first step, that answer must be taken into account in determining whether later propositions follow or are incompatible.
A proposition that neither follows from nor is incompatible with the relevant set of commitments in the disputation at the time of evaluation.
proposition(Used in the context of a semantic theory sensitive to differences in subject matter.)
The content expressed by a sentence, individuated at least in part by the subject matter of the sentence and the contents of its subsentential expressions.
The rule concerning irrelevant propositions is generally accepted by all medieval authors writing on obligations, but in importantly different exact versions. We will come back to some of these versions in the following, but first we must make clear about Burley’s version. He puts special attention to the following question: a proposition is relevant if it follows or is incompatible, but follows from exactly what, or is incompatible with exactly what? As Burley sees it, this relevance must be de