Step two - try before you buy!

_Never was he so relieved to see this kind of message! It was so obvious, but it might just work: Time-limited trials before giving a definitive 'go ahead' was the way to go. Now, if only he could safely try this...._ He figured the safest test he could do was to change one of his clothes: worst case scenario, he'd buy another one. He grabbed an old, red t-shirt in one hand, while holding the stone in the other. "_I wish that for the next 10 seconds only this t-shirt would be blue instead of red_" The stone began to glow and got warm to the touch. When he looked back at his t-shirt, it was blue as expected. He counted to 10, never being so focused as he was now by the color of a basic t-shirt. 6... 5... 4... 3.... _The anticipation was growing_ 2.... 1.... _Any moment now_ 0.... And then, as if nothing had happened, the t-shirt was now red as ever. Jon was relived: he actually had the safety switch he wanted. Now on to phase three: would people really act as if wishes granted by the stone were the only reality they knew? This was a bit more involved to try, as Jon would have to think of a wish with enough of an impact that he would expect people to react to the change. What could he wish for now?