The point of lateralism is to strike a compromise between what will sell and what ought to be explored.

I looked up from under the bush, and saw a dark place in the sky, I heard a voice, it said; Call for rain,—and I did call. But no rain fell—I knew I was to be a rain-maker. Our people have always had rain-makers among them. So looking up again, a flash of lightning came out of the cloud, I heard another voice, it said: I will send you a thunderbolt—pick it up—keep it, and when the earth is dry, hold it up towards the sky, and it will bring down the rain.

A program similar to the computer tutor described on page 165 could be used to requiz you on the codes you have missed.

Alison might have, if she hadn't minxed herself out of a job.