You can pick a good astronaut, they say, by knowing 'the right stuff when you see it. But can you pick a top executive just as surely by merely studying his writing? More and more British firms are using graphology secretly to help them select their managers; yet many scientists would say that this art of interpreting handwriting is about as sensible as reading tea leaves. Q.E.D. ran a special series of tests to find out the truth. Should your future career depend on how you dot the 'i's and cross the 't's?