Condorcet loser criterion

Alright kiddo, let me try to explain what a "Condorcet loser criterion" means in a way that you can understand.

So, let's say you and your friends want to pick what to do for your playdate. Each friend writes down their choice on a piece of paper. You collect all the papers and start counting.

One way to decide what to do is by using something called the "Condorcet method." This means that you compare each choice to every other choice and figure out which choice would win in a head-to-head competition. For example, if everyone voted and rock climbing beat out going to the zoo in a one-on-one match, then rock climbing would be the winner.

But, sometimes there is a problem when using this method. Let's say that everyone voted for either going to the zoo or going to the park. When you compare these two choices, going to the park beats going to the zoo. But, in a three-way comparison, going to the zoo beats out one of the other options. This means that the choice that got the least votes overall (the zoo) would actually win in a head-to-head match against one of the other options.

This is where the "Condorcet loser criterion" comes in. It says that if a choice (like going to the zoo in our example) would lose in a head-to-head match against every other choice, then it shouldn't win in the overall vote. This criteria helps make sure that the choice that most people want actually wins.

So, there you have it! The Condorcet loser criterion is just a rule to make sure that the choice that most people want is the one that wins.