Using covariant derivatives and the operator definitions of quantum mechanics, gauge invariant Proca and Lehnert equations are derived and the Lorenz condition is eliminated in U(1) invariant electrodynamics. It is shown that the structure of the gauge invariant Lehnert equation is the same in an O(3) invariant theory of electrodynamics.

Traduçáo: Normal 0 21 false false false MicrosoftInternetExplorer4 Retirado de Carlos E. Caorsi (Ed.). Ensayos sobre Strawson . Universidad de la República/Faculdad de Humanidades y Ciencias de la Educación, Montevidéo,1992, p. 55-71.

An adequate theory of rights ought to forbid the harming of animals to promote trivial interests of humans, as is often done in the animal-user industries. But what should the rights view say about situations in which harming some animals is necessary to prevent intolerable injustices to other animals? I develop an account of respectful treatment on which, under certain conditions, it’s justified to intentionally harm some individuals to prevent serious harm to others. This can be compatible with recognizing the (...) inherent value of the ones who are harmed. My theory has important implications for contemporary moral issues in nonhuman animal ethics, such as the development of cultured meat and animal research. (shrink)

Most authors who work with moral status automatically dismiss the possibility that plants are the kinds of entities that have moral status. This dismissal coheres with our intuitions about common-sense morality: if plants do not have moral status then we do not have any direct moral obligations to plant life. An implication of such a view is that any suggestion otherwise commits one to be in favour of an absurd conclusion. However, given the recent literature and empirical evidence on plant (...) minds, there are reasons to accept a different perspective that finds the absurd conclusion plausible. (shrink)

Most people are familiar with Justice Stewart's now classic statement that while he cannot describe pornography, he certainly knows it when he sees it. We instantly identify with Justice Stewart. Pornography is not difficult to recognize, but it does elude description. This is because traditional attempts at description are attempts that seek to explain at either an abstract or empirical level rather than at the level that accounts for experience in its totality. Justice Stewart's lament represents the need to understand (...) the subjective experience of pornography and cease trying to explain it in purely objective terms. Much feminist literature in general and Catharine MacKinnon's work in particular seeks to do just this. MacKinnon argues that pornography should not be explained in familiar First Amendment freedom -of-expression terms, but rather in terms of the actual sexual abuse it constitutes in experience. Then, and only then, are we able to select the appropriate legal remedy. This essay suggests that MacKinnon's position not only needs the support of a non-traditional philosophical approach, but has one readily available in the phenomenology of philosopher Edmund Husserl. (shrink)

This chapter is written for an audience that is not intimately familiar with the philosophy of animal consumption. It provides an overview of the harms that animals, the environment, and humans endure as a result of industrial animal agriculture, and it concludes with a defense of ostroveganism and a tentative defense of cultured meat.