Zoe: How

"I wish the test ended" Jon said as his long blond hair returned to it's normal short form.
"How'd we not notice sumthin like that?" Biff asked.
"More importantly" Sarah added "How do we know that short dark hair is what you're supposed to have? "
"I've been testing the stone and every escape clause on a wish I could think of works." Jon started putting the stone down before continuing "I'll wish for my body to change until I wish to reverse it, then I'll wish all our memories would change until a specific time. What do you guys think?"