Iraq thus holds a critical lesson for moderate Democrats.

This conflict exemplifies a critical lesson to be learned by established academics.

The development agency's learned a critical lesson from the July experience: the public responds less to concepts than to concrete models.

I certainly believe Apple and Tim Cook have learned this critical lesson.

He is not attending school, where children his age are learning critical lessons in how to socialize with peers.

The need for one, he said, "is probably the most critical lesson learned."

I thought that was the critical lesson.

Margo learned the first critical lesson about horseback riding within five minutes.

This is the way forward, and this is the critical lesson we must learn from the crisis.

Some writers claim the Air Staff ignored a critical lesson, however: British morale did not break.