Sequentially complete

Okay kiddo, let me explain what "sequentially complete" means in a way that you can understand.

Imagine you have a bunch of toys, and you want to put them in order from smallest to biggest. You start with the smallest toy and put it first in the row. Then you pick the next smallest toy and put it right next to the first one, so the row gets bigger by one toy. You keep doing this until you've put all the toys in order.

Now imagine that you keep doing this, but with numbers. You start with the smallest number and put it first, then you add the next smallest number right next to it. You keep doing this until you've put all the numbers in order.

That's kind of what "sequentially complete" means. It's like putting things in order, but with numbers. If a set of numbers is "sequentially complete," that means there's no other number you can add to it that would make it bigger or more complete. It's the same idea as putting all the toys in order - once you've added all the numbers in order, you can't add any more because there's nothing higher or bigger than the highest number.

So in short, being "sequentially complete" means that a set of numbers is already in the correct order and can't be made bigger or more complete by adding any other numbers.