That they are ‘following the science’ has become the watchword of many politicians during the present pandemic, especially when imposing or prolonging lockdowns or other liberty-restricting regulations. The scientists who advise politicians however are usually careful to add that the decision what to restrict and when is ultimately a political one. In science, as in medical practice, there is a delicate balance to be maintained between confidence in the best available information, and the necessary caveat that the assumptions and calculations (...) on which that information is based are subject to further scientific enquiry. For politicians and the public, moreover, as for patients, whether those informing them are judged to be trustworthy is a necessary consideration, a judgement determined by a variety of personal and political contingencies and circumstances. Ethics, by contrast, unable to appeal to scientific consensus or political authority, let alone a confidence-inspiring bedside manner, must rest the case for its essentially contestable assumptions and arguments being judged trustworthy, on its willingness to admit all reasoned voices to a conversation that is potentially unending, but in the process often highly enlightening. That conversation is contributed to in this issue of the Journal by several reasoned voices, mostly on ethical aspects of the COVID-19 pandemic. Relevant to issues on which politicians claim to be ‘following the science’, but also raising fundamental ethical questions, is this month’s feature article. In Ethics of Selective Restriction of Liberty in a Pandemic, 1 Cameron and colleagues consider ‘if and when it may be ethically acceptable to impose selective liberty-restricting measures in order to reduce the negative impacts of a pandemic by preventing particularly vulnerable groups [for example, the elderly in COVID-19] of the community from contracting the disease’ [and thereby, for example, increasing …. (shrink)