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Another attempt at asserting a rational justification for morality is Aristotle's contention that being moral or virtuous will tend to lead to a better life. Someone might argue that morality was arrived at purely rationally or, notwithstanding the origins of the moral sense, that there is a rational grounding and justification for morality, or perhaps morality is a diktat of some sort of supernatural agency. Kant believes morality is grounded in reason: we are not only sentient beings, governed by the pleasure and pain delivered by our senses; we are also rational beings, capable of freedom. [Extracted from the article]

DEAR EDITOR: In his discussion of "quantum ethics" (PN 156), Myles King falls into the common trap of forgetting that "we" are part of "the world". Neither is Myles justified in claiming that the "spontaneous appearance" of choices could be a source of free will. The quantum metaphor can provide a much better explanation for free will. [Extracted from the article]

Letters to the editor are presented in response to previous articles on topics including naming of astronomical objects in the August 24, 2013 issue, vaccine effects on helper T-cells from the August 17, 2013 issue, and laser-propelled spacecraft in the August 24, 2013 issue.

A letter to the editor is presented in response to an article by George Ellis and Francis Crick in the August 17, 2013 issue about causality.