Sir: Chris Newell (letter, 23 August) should bear in mind Karl Popper’s distinction between scientific hypotheses - “the earth is flat” - which can be falsified, and others which cannot - “kindness is a virtue”. No scientific proposition is ever more than a hypothesis. That’s how science develops. Robert Winston is absolutely right to allow for other categories of statement - about religion, god, or whatever- as these are and always have been essential to human thinking and behaviour.
DR I B YAUGHAN LONDON W11
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