Rule of a Fortune Cookie

I always thought it is a common knowledge that one has to finish an entire fortune cookie in order for the fortune from it to come true. However, judging from the reaction of my sister, this “knowledge” wasn’t as common as I thought.

“What?!?”

Was the exact word from my sister’s mouth when I told her to finish the cookie or the fortune will not come true.

“What kind of theory is that?!?” She started to laugh as she looked at me in disbelief.

I was shocked to realize her lack of knowledge about the world of fortune cookie.

“It is a common sense.” I told her. “You must finish the cookie in order for the fortune to take effect. So if you don’t like the fortune, don’t finish the cookie. But if you want the fortune to come true, you got to finish it.”

My sister continued to laugh, and after nearly a minute of a good laugh, she finally calmed herself down enough to ask,

“Where did you hear that?”

“…” I couldn’t answer. Come to think of it, I can’t remember when, where or how I acquired this knowledge. I tried to remember how long I have known this *rule*. I think I heard someone else said it in the past, but I couldn’t remember who. In fact, I’m not even sure if I wasn’t the one who told this person about the golden rule.

Is that mean I made this rule up??? But it makes perfect sense… I wonder if anyone knows the origin of this rule is… I wonder if anyone else heard of this rule (aside from the ones who heard it from me…)