RYC Journey 2017 - Adventure Story: Trapped in a Desert

The next morning, you start the day discussing amongst one another the water situation.
You never paid attention in zombie survival class, so you don't remember how many days a person can live without water.
You're pretty sure that it's either 5 or 7 days.
The Quiet During Household tries to raise her hand.
The One That Always Calls You Out During Household asks "So, which is it? 5 or 7?"

You're not really sure of the answer. But you decide to say: