Gotthold Ephraim Lessing, thinker, dramatist and controversialist of many-sided interests, is the most representative figure of the German Enlightenment. His defence of Spinoza, who had traditionally been condemned as an atheist, provoked a major controversy in philosophy, and his publication of H. S. Reimarus' radical assault on Christianity led to fundamental changes in Protestant theology. This volume presents the most comprehensive collection to date in English of Lessing's philosophical and theological writings, several of which are here translated for the first (...) time. They are edited and translated by H. B. Nisbet, who also provides an introduction that sets them in their historical and philosophical contexts. (shrink)

It is demonstrated on the basis of the Dirac equation that quarks cannot be confined by a vector gluon potential of the form(r/r 0)a or[ln(r/r 0]a, a>0, if the quark-gluon interaction conserves parity. In order to confine quarks with the parity-conserving interaction, the effective gluon potential must be a pseudovector or a scalar. These are shown in a simple Yang-Mills field with theSU(2) group.

The so-called fourth book of Aristotle's Meteorologica is not about meteorological phenomena at all. It describes the formation out of the four elements of ‘homoeomerous’ substances, by which are meant minerals such as stones and metals, and organic substances like flesh, skin, and hair, and the changes they can undergo under the influence of heat, cold, and moisture. Most commentators, ancient and modern, have seen that it has very little to do with the first three books of the Meteorologica to (...) which it is attached, and Alexander suggested that it should be placed after the second book de Generation et Corruptione. (shrink)

It is proposed in this paper to develop a method by which the most general problem of the algebra of propositions is solved. This problem is to construct all propositions whose truth is independent of the form of the variables. As might be expected this method will enable us to determine without the use of matrices the consistency and independence of propositions, except in the case of those fundamental properties, which taken together define consistency itself. In the discussion which follows (...) no limitations are placed on the meaning of the terms and the word proposition is used simply in the sense of a variable. If we were to say, for example, that our variables must be restricted to zero or one values, we would be introducing a limitation which would reduce the generality of our science. A logic may be false in the sense that its postulates lead to contradictory theorems, or it may be false in the sense that it lacks generality, and the situation is not saved by calling it a two-valued, or a three-valued logic, or a logic of “propositions,” or by designating it by some other euphuism. (shrink)