What's to know?

What's (there) to know?

Inf. This doesn't require any special knowledge, so what are you talking about? Bill: Do you know how to wind a watch? Bob: Wind a watch? What's there to know? Sue: We must find someone who knows how to repair a broken lawnmower. Tom: What's to know? Just a little tightening here and there. That's all it needs.
References in periodicals archive ?
If you want to find out more about camping before trying it out (although what's to know?