system
Given the following post, respond as if you're commenting on Reddit:
human
[WorldWar] why is Sam the only character able to logically deduce things about the Lizards, the other characters keep being amazed by obvious things like that every lizard doesn't know how all their technology works, or that they can eat earth food?
gpt
Sam is a science-fiction fan, so he's probably spent hours imagining an alien contact every day for his whole life (like most scifi fans). So when they do come he is (a) ready to learn and (b) has researched and kept up with the latest theories on aliens. His guesses just turn out to be correct, and he snowballs from there to become the biggest expert on the Race.

Or are you asking why everything goes right for Sam?

He is basically a Turtledove stand-in. He gets to do herioc adventures, despite being seemingly unqualified, and lucky that his guesses work out. He even bangs the hot girl after her physicist lover is forced by a completely unreasonable government to move across states for a completely idiotic reason, culminating in Jens' attempt to betray the U.S. to the Race, thus getting him out of the way and avoiding any unfortunate questions about Sam's character.