1.   At home, I started to question the existence of what survived.

2.   But few Americans would question the existence of predatory pricing.

3.   His doubts, he said, have led him to question the existence of the crime family the government says his father led.

4.   So what if he questions the existence of a supreme being?

5.   Ultimately, she found herself questioning the existence of God.

6.   While not questioning the existence of flow, some sport psychologists believe that pursuing the mental state is unnecessary.

7.   You could take it cynically, take it darkly, you could make it question the existence of love.

8.   Even the baby is up for grabs, as the oldsters even question its existence.

9.   Fyodorov questioned the existence of such information, and said he fails to understand Lebed.

10.   It questioned the existence of the disease, linked by its proponents to high-noise environments such as aircraft maintenance plants.