R Sheppard’s advice to “forget experts and make up your own minds” seems highly irresponsible. Would you ignore the advice of a structural engineer? the advice of a doctor? Or the advice of a financial consultant? Experts in all fields are experts because they have studied their subject, they have access to data that most people wouldn’t understand and because of their studies they are able to interpret it. Climate experts are warning us about a threat to civilization as we know it, and we should listen. R Sheppard tells us that we cannot use weight of numbers as evidence – agreed, but if 100 …