It makes straightforward sense to ask a person ‘Why did you decide to become a solicitor?’ (or a carpenter, shopkeeper, teacher or professional musician). There is no mystery about the question ‘Why did you decide to become a British citizen?’ (or a member of the Liberal Party, the Roman Catholic Church or the Aristotelian Society). It may be difficult to answer any of these questions. We may not remember, or may be unable to articulate, what first led us to seek ordination, join the Army or stand for Parliament; but the questions themselves are clear, and they ask for fair comment on matters of public or private interest. There are other questions that sound like these but raise difficulties of another order.