 What is the double meaning of the story’s title?
DOUBLECROSS by JAMES Mac CREIGH Revolt was brewing on Venus, led by the descendant of the first Earthmen to land. [Transcriber's Note: This etext was produced from Planet Stories Winter 1944. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] The Officer of the Deck was pleased as he returned to the main lock. There was no reason why everything shouldn't have been functioning perfectly, of course, but he was pleased to have it confirmed, all the same. "Everything shipshape, I take it!" But after all, they're human beings, just like us—" "Not any more. Four or five generations ago they were. "They had to acclimate themselves to Venus's climate. He stared at the wooden shacks that were the outskirts of the native city, dimly visible through the ever-present Venusian mist. The native guard of honor, posted a hundred yards from the Earth-ship, stood stolidly at attention with their old-fashioned proton-rifles slung over their backs. A few natives were gazing wonderingly at the great ship, but made no move to pass the line of guards. They think there will be hordes of immigrants from Earth, now that we know Venus is habitable. And there's some sort of a paltry underground group that is spreading the word that the immigrants will drive the native Venusians—the descendants of the first expedition, that is—right down into the mud. After all, the fittest survive. That's a basic law of—" The annunciator over the open lock clanged vigorously, and a metallic voice rasped: "Officer of the Deck! Post Number One! Instruments reports a spy ray focused on the main lock!" "From their own mouths you have heard it. Our parents came from Earth. "Then we must act. The Council has told us that we alone will decide our course of action. We have agreed that, if the Earth-ship returns, it means disaster for Venus. Therefore, it must not return." "The Council did not know what we would face. The Councilmen could not come to the city and see what strength the Earth-ship has." He reached to a box at his feet, held up a shiny metal globe. It will be set by means of this dial—" he touched a spot on the surface of the globe with a pallid finger—"to do nothing for forty hours. Atomite." There will be danger, I think...."
 “Doublecross” because Svan plans to double cross his friends; and “Doublecross” because it turns out that, ironically, Svan was who pulled the slip with the double cross, not his friends whom he suspected to have pulled it and not had the courage to admit it.
 “Doublecross” because Svan plans to double cross the council; and “Doublecross” because Svan was the one who pulled the slip with the double cross, meaning that he should have been driving in the end.  “Doublecross” because Svan plans to double cross his friends; and “Doublecross” because it turns out that, ironically, Svan was who pulled the slip with the double cross, not his friends whom he suspected to have pulled it and not had the courage to admit it.  “Doublecross” because Svan plans to double cross the Earth; and “Doublecross” because it turns out that Ingra was who pulled the slip with the double cross, not his friends whom he suspected to have pulled and not had the courage to tell  “Doublecross” because Svan plans to double cross Ingra, his girl friend; and “Doublecross” because it turns out that Svan knew he had the double cross slip all along.