They're challenging the very notion of Western models of development.

So, really even challenging the notion of what can be considered a story.

Notion ? Notion?

And this is a very challenging idea. It's a very challenging idea to mainstream media. It's a very challenging idea to anyone who has invested an enormous amount of time and expertise, and who has a lot of energy invested in the notion that he or she knows better than everyone else.

You know the uni is the most challenging, so number ten is challenging.

Tremendously challenging.

That was challenging.

Why so challenging?

Challenging gender based violence

Not a challenging task.

And this is a very challenging idea. It's a very challenging idea to mainstream media.

15.1.1 The notion of quotas

So the notion of collaboration

Very different notion.

An interesting notion.

They had a notion, a Platonic notion, of what tomato sauce was.

But striking the proper balance is challenging.

A bit more challenging, right?

So this is more challenging

Are you challenging my orders?

It's a very challenging idea to anyone who has invested an enormous amount of time and expertise, and who has a lot of energy invested in the notion that he or she knows better than everyone else.

We use the notion of color.

That is the notion of investment.

But the whole notion of electrons, protons, they're all kind of predicated on this notion of charge.

However, the situation in Cité Soleil remains challenging.

The societal one is a lot more challenging.

It's an amazing notion.

A bit more challenging, right? (Laughter)

It's not very challenging any more.

And that's challenging because it's easy.

Your job needs to be challenging.

This is challenging work to do.

Something is very challenging to me.

This is the notion of loss aversion.

This is the normal notion of control.

This is the normal notion of control.

The selection of indicators has proven to be challenging.

Of course, the issues are highly complex and challenging.

C. Appeals challenging the issuance of voters apos cards

But deciphering the script is a very challenging task.

I've lost notion of time.

I've lost notion of time.

This is a mistaken notion.

I got a different notion.

Seems stingy to my notion.