They think his not swearing is like company programming.
ALSO I do think they'd think that cause weyland corp stratt knew he was underqualified but wanted him on the ship so implieddddd that maybe he's a robot so don't worry about me sending a civilian up there with you, all g
Project Hail Mary/Alien crossover is Xenomorph stuff starts happening and grace gets hurt and the crew is like. Is that blood. Is that red blood. We thought you were the synth for this voyage.
And he's like??? I'm not- I'm not a synth??
[Whole crew baffled]