Simon Glendinning is Professor of European Philosophy in the European Institute at the London School of Economics and Political Science. He realised he could make a career in philosophy when he spent two hours successfully untangling the twisted strings of a stunt kite. Wittgenstein says that 'philosophy unties knots in our thinking; hence its results must be simple, but philosophizing has to be as complicated as the knots it unties'. Simon has a BPhil and a DPhil in Philosophy from Oxford University and has been exploring knots for a living since 1994. He is still not clear whether philosophy is a complicated education for grown-ups or just a simple occupation for grown-ups who never made it beyond childhood.