"Hmm... Then how about a sex change soda machine?"
"A sex change machine? That's my idea... wait, did you say 'soda'?"
"Of course I said 'soda', Jon. Just have the machine produce sodas that magically change your sex."
"You can't change something magically with a scientific experiment," said Jon.
"Okay, not magically, they scientifically change your sex. They... Umm, I don't know how to scientifically explain changing sex. Let's just say it does it. And keep it simple. No reality changing... why would a soda machine change reality?"
"All right. I wish that the machinery in this room would change to a soda machine whose sodas change people's sex." And the whole room transformed. The room was empty except for a soda machine. It looked normal except for the lack of brand names--the buttons just said "Cola," "Root Beer," etc. "I also wish that there's a large sign on top of the machine that says 'sex change sodas'." And the sign materialized. Jon explained, "we have to be fair, Karyn."
"But who reads signs on soda machines?" asked Karyn.
"Nobody. We don't have to be that fair. But if anyone's really stuck they can always buy another soda to change back."
"What if they don't have change?"
"Well, if they don't have change, they can't change. That's their problem. Let's just see who walks by and doesn't read signs."
