In this paper some basic aspects of the theory of graded consequence are reconsidered, based on many results that appeared since the inception of graded consequences in 1986. Relationships of the notion of graded consequence with the notions of consequence in many-valued and fuzzy logics are discussed. Following this, a detailed study is carried out on the necessary conditions that follow from ...

We show which implicational relations hold between the three principles ex falso sequitur quodlibet, tertium non datur, and double negation elimination, on the basis of minimal logic.

The marginalist revolution transformed the principles of price determination in competitive markets. Nevertheless, the systematization that accompanied neo-classical theory, especially Walras’ general equilibrium formulation, confirmed Classical economists’ belief, most powerfully articulated by Smith, that impediments to free trade should be removed. So, while the transition from the Classical...

The purpose of this project is to discuss the astronomical development from the heliocentric theory to the geocentric theory. The main goal is to eliminate the common misconception that the Copernican system simply entails a change in the frame of reference from the Ptolemaic system. In particular, we will show how the Copernican system allows us to determine the size of the Universe (in terms ...

We study a setting in which firms produce items whose quality is ex-ante unobservable, but learned by customers over time. Firms take customer learning into account when making production decisions. We focus on the effect that the review process has on product quality. Specifically, we compare equilibrium quality levels in the setting described above to the quality that would be produced if cus...