People have taken up the challenge, done something about it.

Challenge

This first challenge is what I refer to as the persuasion challenge.

Specifically, something like the DARPA Grand Challenge might be adversarial or not.

And I challenge my students to try to think of something that I cannot somehow relate to mathematics

Challenge phrase

Challenge password

challenge password

Challenge password

I challenge you to try it.

It's a challenge to our ingenuity.

I want to challenge you today.

Who are you to challenge me?

A martial challenge ... to the death.

The Chávez Challenge

That's the challenge.

And the challenge.

That's our challenge.

Accept the challenge.

It's a challenge.

You challenge me?

I challenge you

It's a challenge

We need to reframe the challenge that is facing Africa, from a challenge of despair, which is called poverty reduction, to a challenge of hope.

I'm going to work with him to create something different, something that's going to get people thinking, that's going to challenge the way we look at the world.

I intend to challenge him to a game.

So our first challenge was to find these things, and that was a challenge, indeed.

I don't mean to challenge your theory.

Here's my challenge to the Defense Department.

And to challenge them. gt gt Adrian

I want you to embrace the challenge.

I'm going to let you challenge authority.

The novelist Richard Ford speaks about a childhood challenge that continues to be something he wrestles with today.

A challenge for you to build something for yourself... by telling you you're not worthy of his accomplishments.

The challenge to figure out what it will take to actually do something that makes a significant and sustainable difference.

Challenge password is empty.

A challenge, of course.

This is the challenge.

It's a huge challenge.

And that challenge is

Challenge is resist it.

An invitation, a challenge?

There's a real challenge.

Is that a challenge?

Nothing like a challenge.