D.O. Thomas; VI*—The Duty to Trust, Proceedings of the Aristotelian Society, Volume 79, Issue 1, 1 June 1979, Pages 89–102, https://doi.org/10.1093/aristotelian.

When can one say that a new theory is truer than the old one it contradicts, even though neither is absolutely true? We are primarily concerned with the case in which the conflicting theories offer answers to the same questions, and so we do not introduce considerations of "logical width". We propose that part of the new theory is truer than part of the old one when the former part gets right whatever the latter-part got right while the former does (...) not make any new mistakes. Pragmatic considerations will determine the relative importance of whatever new mistakes the new theory does make as a whole. To avoid artificial counterexamples, we restrict the parts compared to those that are "convex". A "convex" theory is one that holds in all cases intermediate between any two cases in which it holds. (shrink)

D.O. Thomas; VI*—The Duty to Trust, Proceedings of the Aristotelian Society, Volume 79, Issue 1, 1 June 1979, Pages 89–102, https://doi.org/10.1093/aristotelian.

When leading spectroscopists in Europe and America were engaged, during 1897, in exploring the recently-discovered Zeeman Effect, they were overtaken by a relatively obscure phsicist working in Dublin. Thomas Preston had previously been known only for his excellent textbooks. His achievement in discovering the Anomalous Zeeman Effect was immediately recognized, but his untimely death has deprived posterity until now of a full account of his life and qualities.

D. O. Thomas; XIII—Obedience to Conscience, Proceedings of the Aristotelian Society, Volume 64, Issue 1, 1 June 1964, Pages 243–258, https://doi.org/10.1093/ari.

On Dharma as depicted in Mahābhārata, Hindu classical epic.

Richard Price argued for democratic institutions on the ground that each individual has a moral responsibility for the good government of his community. This assumption that political responsibilities are moral responsibilities was in turn derived from the belief that each individual has a continuous duty to create in his own personality and in his relations with his fellow men the conditions of the virtuous life. Popular political responsibility was thus defended by the extension of a rigorous moral athleticism into the (...) sphere of social arrangements. The dominating feature of this demand for comprehensive reform and reconstruction is the attempt to construe the moral life as a process in which the individual struggles to recreate himself in the light of his most mature conceptions. These conceptions, Price maintained, are determined rationally, and that they are so is presented in two different ways. Either as in the case of the principles of moral judgment they are held to be the objects of a rational intuition; or as in the defence of democratic institutions they are derived from an abstract construction of the demands of moral personality. (shrink)