Multigrade predicate

Ok kiddo, so imagine you have a collection of toys. Some toys are bigger or smaller than others, and some are heavier or lighter. Now let's say you want to sort your toys into groups based on their size or weight. That's kinda like what a multigrade predicate does with objects in computer programming.

A predicate is like a question that we ask about these objects. So let's ask some questions about our toys: "Is this toy bigger than the others?" or "Is this toy heavier than the others?" These are called predicates because they give us a true or false answer for each toy.

Now, a multigrade predicate is when we ask more than one question at the same time, to sort our toys even more specifically. For example, we might ask "Is this toy bigger AND heavier than the others?" This would only be true for the very biggest and heaviest toys in our collection.

In computer programming, a multigrade predicate might be used to sort data based on multiple criteria at once, like sorting a list of cars by both their make and their price. It's like asking more than one question to get a more specific answer.