A man at the dawn of history who could utter such a complicated concept could produce children for whom anything would be possible.

That is not a complicated concept, but there are times when that needs to be said, like right now.

There is a very complicated concept called 'entropy' that helps us understand how the universe changes.

Educators love them because they help students understand complicated concepts.

But was she capable of absorbing a brand-new, rather complicated concept?

"I know that's a very complicated concept for some."

Students will have to master increasingly complicated concepts as they progress.

How to break down a complicated concept so each part is small enough to digest?

To this end, he layers more complicated concepts, introducing them to the player in a simple manner, and building from there.

While this looks like a complicated concept, it is really only a genetic engineering version of cut and paste.