The Spy
There seems to be a new visitor to my room without my knowledge. Both courteous and patient, he always waits for the right opportunity before striking. This particular day, he thought he could sit on my calculus notes and watch away. What nerve!
He's actually sitting right on the lines where I've written down the nth-order Taylor expansion series formula for a continuous function of two variables. Reading between the lines? Coincidence? I think not!