There is a question that we have been asked again and again for months now: 'Do you actually exist?' At first, we were quite irritated. Imagine you were asked that. What would you answer? Our first impulse was a clear 'yes'. But the longer you think about it, the less sure you are. Last night Till and I debated about it well into the night. Maybe it was the red wine, but in the end we weren't at all sure that we really existed. To be honest, at some point we weren't even sure what it means to exist.