Challenge questions guide a deeper inquiry for especially thoughtful individuals and groups.

Remind the group of the last line spoken by the woman in the story:

It's turtles all the way down.

Say that two men named Thomas Cathcart & Daniel Klein wrote a book called Plato and a Platypus Walk into a Bar. They tell the turtle story in the book, then talk about what philosophy is like. They say:

Questions beget questions, and those questions beget another whole generation of questions. It's questions all the way down.

Ask:

• What do Cathcart and Klein mean when they say, "It's questions all the way down"?
• Are they right? Once you get started with big questions and answers, is there any end in sight?