He waves to me with a free arm. He knows one human greeting and by golly he plans to use it. - Andy Weir

Conclusion: I don't need the water reclaimer at all. I'll drink as needed and dump my waste outdoors. Yeah, that's right, Mars, I'm gonna piss and shit on you. That's what you get for trying to kill me all the time.

Time to get to know my fellow patients. I don't know who I am or why I'm here, but at least I'm not alone — aaaand they're dead.

This allowed me to do what writers treasure more than anything else: catch the reader off-guard. There’s nothing better than knowing you’re going to outwit with the reader. And the type of people who read sci-fi are very difficult to outwit.