What do you call this kind of riddle? More importantly, can you tell me a few more of them?
Here's how it works:
In a group of people, someone will start out by making some sort of statement. The statement has to adhere to some sort of unknown rule. After a few statements, someone else in the group will try to see if they know the rule by making their own statement. The person who knows the rule will either tell them that they are correct, or counter their incorrect statement with a correct statement. The idea is to keep going until everybody in the group can consistently make correct statements.
Here are some examples from last night (also, spoilers):
In my world
"In my world there is beer but no wine"
"In my world there are kittens but no cats"
Running with scissors
"I am running with scissors. I drop them. Are the scissors opened or closed?" (at this time, players can guess) "They're closed."
"Now I'm running with scissors. I drop them. Are the scissors opened or closed?" (players guess again, probably guessing "closed") "No, they're open"
"I throw a ball. It bounces off the wall. Who catches it?" (wait for response)
What do you call these? Where can I find more? Do you know any?