Must finish first year of fellowship.
"There's no use trying," she said: "one can't believe impossible things." "I daresay you haven't had much practice," said the Queen. "When I was your age, I always did it for half-an-hour a day. Why sometimes I've believed as many as six impossible things before breakfast."
-- "Through the Looking-Glass" by Lewis Carroll
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.