Wolfgang Lenzen

WOLFGANG LENZEN On the Origin of the Utilitarian Maximization Requirement

Wolfgang Lenzen

0 Foreword The aims of this paper are (i) to summarize the semantics of (the propositional part of) a unified epistemic/doxastic logic as it has been developed at greater length in Lenzen [1980] and (ii) to use some of these principles for the development of a semi-formal pragmatics of epistemic sentences. While a semantic investigation of epistemic attitudes has to elaborate the truth-conditio...

Generalized Kripke Models for Epistemic Logic

In this paper a generalization of Kripke models is proposed for systemizing the study of the many different epistemic notions that appear in the literature. The generalized Kripke models explicitly represent an agent's epistemic states to which the epistemic notions refer. Two central epistemic notions are identified: objective (S5) knowledge and rational introspective (KD45) belief. Their inte...

A rare accident

Notwithstanding the great efforts made during the past decade to explore the domain of modal systems between S4 and S5, it may not be very unusual that new systems are continually discovered. Neither may it be extraordinary that one such new system is discovered independently by two different authors. It seems however, to be a rare accident, indeed, if two authors independently discover one and...

Ecological footprint model for the Eastern Suburbs

The news was delivered to local councils by University of Sydney researcher, Manfred Lenzen. Using an adaptation of the ecological footprint model of resource and environmental impact estimation, Lenzen has worked out the environmental impact of the Eastern Suburbs and compared it to the situation of only a few years previously. The findings? The ecological footprint of the Eastern Suburbs is g...