_It's so easy!_ The Guesser thought. _So incredibly easy!_ Even the captain of the ship would only be a Class Two Exec. No one would question him--no one would _dare_ to. A lieutenant looked up, startled as he entered the ship itself, and saluted hurriedly. "It's an honor to have you aboard, great sir," he said apologetically, "but you realize, of course, that we are taking off in a very few minutes." Words choked suddenly in the Guesser's throat, and he had to swallow hard before he could speak. "I know that. I'm ... I'm going with you." The lieutenant's eyes widened a trifle. "No orders have been taped to that effect, great sir." _This is it!_ thought The Guesser. He would either put it over now or he'd be lost--completely. He scowled. "Then tape them! I will apologize to the captain about this last-minute change, but I want no delay in take-off. It is absolutely vital that I reach D'Graski's Planet quickly!" The lieutenant blanched a little. "Sorry, great sir! I'll see that the orders are taped. You wish a cabin?" "Certainly. I presume you have an adequate one?" "I'm sure we do, great sir; I'll have the Quarters Officer set one up for you immediately." "Excellent," said The Guesser. "Excellent." Fifteen minutes later, the _Trobwell_ lifted from the planet exactly on schedule. The Guesser, in his assigned room, breathed a deep sigh of relief. He was on his way to D'Graski's Planet at last! * * * * * "Tell me, great sir," said the captain, "what do you think the final decision on this case should be?" He shoved the sheaf of papers across the desk to The Guesser. The Guesser looked at them unseeingly, his mind in a whirl. For five days now, the captain of the _Trobwell_ had been handing him papers and asking him questions of that sort. And, since he was the ranking Exec, he was expected to give some sort of answer. This one seemed even more complex than the others, and none of them had been simple. He forced his eyes to read the print, forced his mind to absorb the facts. These were not clear-cut problems of the kind he had been dealing with all his life. Computing an orbit mentally was utterly simple compared with these fantastic problems. It was a question of a choice of three different types of cargoes, to be carried to three different destinations. Which would be the best choice? The most profitable from an energy standpoint, as far as the ship was concerned, considering the relative values of the cargoes? What about relative spoilage rates as compared with fluctuating markets? The figures were all there, right before him in plain type. But they meant nothing. Often, he had been unable to see how there was any difference between one alternative and another.