But after hearing more about the concept, he changed his mind.

Is it just me or does nothing about the concept of this film make sense?

I wish I'd asked him about the concept of a just war.

It had to do with concerns about the concept of the film, not the star.

What is it about the concept of personal responsibility that you don't like?

As with many a summer Hollywood movie, it doesn't pay to think too hard about the concept.

Maybe I'm reading it wrong and you are just talking about the concept of searching?

We can learn about new concepts by applying our knowledge learned from things in the past.

Yet despite the excitement about the concept, some question how popular it will become.

What we wanted to do was just talk about the concept.