Hi! If a character was sedated due to their behavior on arrival, it would be possible for them to find out the usual post-arrival examination process by asking other characters who went through it what they remember. It would be the same general experience outlined here in the FAQ or in our static arrival prompts.

As for discovering any information on how they arrived, how the doors work, etc. that would not be possible. There is no information about those things that they could find by hacking Duplicity systems. Hacking attempts would likely result in a citation.