Bokelskere.no

"How many backup communications systems does an Ares mission have?" Venkat asked.
"Four," Chuck said.
"Three," Morris said.
"No, it's four," Chuck corrected.
"He said backup systems," Morris insisted. "That means not including the primary system."
"Oh right. Three."
"So four systems total then," Venkat said. "Explain how we lost all four."