Fatalism and Rationality are two separate valuable attributes. In Rationalism and rationality, the active and creative role of human is emphasized, meaning ignorance aversion, imagination aversion, illusion removal and superstition removal. This concept is the opposite of the concept of fatalism in which human has the minimum activity and the emphasis is very much on the role of trans-physics i...

Brandenburger, Friedenberg, and Keisler [Econometrica 76 (2008), 307352] show that rationality and common assumption of rationality (RCAR) is impossible in a complete and continuous type structure. We show, by inroducing an alternative notion of “weak assumption”, that rationality and common weak assumption of rationality (RCWAR) is possible in a complete and continuous type structure. This pos...

The rationality of a fuzzy choice function is a hot research topic in the study of fuzzy choice functions. In this paper, two common fuzzy sets are studied and analyzed in the framework of the Banerjee choice function. The complete rationality and bounded rationality of fuzzy choice functions are defined based on the two fuzzy sets. An assumption is presented to study the fuzzy choice function,...

Rationality is a fundamental concept in economics. Most researchers will accept that human beings are not fully rational. Herbert Simon suggested that we are “bounded rational”. However, it is very difficult to quantify “bounded rationality”, and therefore it is difficult to pinpoint its impact to all those economic theories that depend on the assumption of full rationality. Ariel Rubinstein pr...

in recent decades, rationality has become one of the important and controversial issues in the intellectual circles. there are many philosophers who have put (and still put) under question the status of reason and human rationality. among those who believe in human reason is popper. to show reason's ability, he rejects positivism and justifying approaches totally; and, designing falsificat...

D and normative modeling of decision making under risk and uncertainty have grown apart over the past decade. Psychological models attempt to accommodate the numerous violations of rationality axioms, including independence and transitivity. Meanwhile, normatively oriented decision analysts continue to insist on the applied usefulness of the subjective expected utility (SEU) model. As this gap ...

The introduction of a small amount of bounded rationality into a model sometimes has little effect, and sometimes has a dramatic impact on predicted behavior. We call a model robust to bounded rationality if small deviations from rationality result only in small changes in the equilibrium set. We also say that a model is structurally stable if the equilibrium set (given fully rational agents) v...

According to one view about the rationality of belief, such rationality is ultimately nothing other than the rationality that one exhibits in taking the means to one’s ends. On this view, epistemic rationality is really a species or special case of instrumental rationality. In particular, epistemic rationality is instrumental rationality in the service of one’s distinctively cognitive or episte...

My aim in this paper is to explore the relationship between epistemic rationality and instrumental rationality. By epistemic rationality, I mean, roughly, the kind of rationality which one displays when one believes propositions that are strongly supported by one's evidence and refrains from believing propositions that are improbable given one's evidence. Prominent epistemologists frequently em...