Scrooge and Dewey in “Unfinished Business”

Scrooge

We'll find another route, it's not safe for amateur adventures.

Dewey

That sounds like a challenge.

Scrooge

I have to stress, that is not a challenge.

Dewey

...is exactly what you say to dissuade the weak of heart from accepting the challenge. Well, challenge accepted!

Scrooge

There is no challenge!