They create the agreement by tossing a coin If someone guesses it was. People have to learn. Best lost to people working in the mine to earn money sending people to solve was learning.
They built Agreement By a coin toss if one guesses he has to learn. People who have lost work in the mines to earn money to send people that end up being studied.
They made a pact by tossing a coin. If anyone guess right, he went to school. The person who loses goes to work in the mines to earn money to send the right school.