 What doesn't the narrator believe Gorb to be?
My three staff men, Auchinleck, Stebbins and Ludlow, walked shieldwise in front of me. The aliens came in every shape and form, in all colors and textures—and all of them eager for a Corrigan contract. The Galaxy is full of bizarre beings, but there's barely a species anywhere that can resist the old exhibitionist urge. I thought of it privately as MacTavish IV and referred to it publicly as Ghryne. Stuff like this: Want to visit Earth—see the Galaxy's most glittering and exclusive world? A life of wonder and riches can be yours! Broadsides like that, distributed wholesale in half a thousand languages, always bring them running. It's the best of its kind, the only really decent place where Earthmen can get a gander at the other species of the universe. There was a lidless eye at the top of his head and five lidded ones, one above each arm. "Before we begin, I'll need certain information about—" "I am a being of Regulus II," came the grave, booming reply, even before I had picked up the blank. The being closed his eyes and toddled around in a 360-degree rotation, remaining in place. "My Regulan name no longer matters. "I'll be placed on exhibition at your Institute on Earth. The spherical creature clapped his hands in joy, three hands clapping on one side, two on the other. A Terraphile alien who goes to the extent of rechristening himself with a Terran monicker would work for nothing, or even pay us, just so long as we let him get to Earth. Our outfit has all the ursinoids it needs or is likely to need in the next few decades, and so I got rid of him in a couple of minutes. He was followed by a roly-poly blue-skinned humanoid from Donovan's Planet, four feet high and five hundred pounds heavy. I passed him along to Auchinleck to sign at anything short of top rate. It was the isolationism of the late 29th century that turned me into the successful proprietor of Corrigan's Institute, after some years as an impoverished carnival man in the Betelgeuse system. Back in 2903, the World Congress declared Terra off-bounds for non-terrestrial beings, as an offshoot of the Terra for Terrans movement. Before then, anyone could visit Earth. After the gate clanged down, a non-terrestrial could only get onto Sol III as a specimen in a scientific collection—in short, as an exhibit in a zoo.
 a non-terrestrial
 a non-terrestrial  an Earthling  a hero  a con-man