Getting back to my office with some sesame chicken and rice, I noticed that the pair of chopsticks I had picked up was deficient to the tune of one. I didn't really feel like going back to the canteen to get another one, so scouted around my desk for an alternative. I found a plastic knife, which I used with my one chopstick to make an ad hoc pair of chopsticks. Result? It's actually easier to eat rice with one chopstick and a plastic knife than it is with a pair of chopsticks. Good to know.