I found it. . ."And Then There Was One" by Ross Rocklynne. The
"And Then There Was One" by Ross Rocklynne.
The way I found it was interesting:. After I posted my question, I started looking through other'sother questions to see if I could help out. I came across a question about two men who get stuck on a frictionless mirror surface. I thought. . .wow, that sounds like one of the stories in the anthology that my story came from."Wow, that sounds like one of the stories in the anthology that my story came from." So I looked at the answer and it said the story was "The Men on the Mirror" by Ross Rocklynne and was from an anthology of the same name. I looked up that anthology on ISFDB and found "And Then There was One" thenthen I had only to find a summary of ATTWO (I actually ordered the book from Amazon as well). . .and, and voila. . .story! Story found! So this website helped me find the story in an unexpected way! Thanks everyone!