'Stop at red' campaign

tynan This question (and its variations) is often set up as some kind of deep-seated profundity, but is in fact a trivial mechanical question that relies on equivocation for it's 'mystery'.

I think the real use of that question is that, by evoking a sense of mystery, it provokes thought in providing an answer. What is important is not the answer, but the fact that it makes people think.