the *rational man’s expansion* that this paper introduces.

The rest of this paper is organized as follows. Section \[ai-econ\] grounds this paper in the context of research traditions at the intersection of economics and artificial intelligence, whereas Section \[background\] provides an overview of abstract argumentation frameworks, semantics and principles, and of (bounded) rationality. Then, Section \[preferences\] presents argumentation frameworks in the context of choice functions for economic decision-making. Section \[paradigms\] establishes the argumentation principles the rational man paradigm requires. Hereby, the new rational man’s *reference independence* principle is defined, based on which Section \[rational-semantics\] shows that typically, argumentation semantics do not guarantee a rational choice process. To still allow for abstract argumentation in accordance with the rational man paradigm, a new argumentation framework *expansion* that helps guarantee economic rationality is defined in Section \[rational-expansion\]. Subsequently, Section \[dialoges\] provides examples of how our concept of *rational man’s argumentation expansions* can be applied in different argumentation-based choice scenarios. Finally, Section \[related\] shows that the *rational man’s expansion* is also useful in the context of preference-based argumentation, before Section \[conclusion\] concludes the paper by highlighting relevant future work.

Economic Rationality and Artificial Intelligence {#ai-econ}
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Artificial intelligence frequently draws from concepts that have 