Bone is lost

This is a frame from the Bone comic.
I think that Bone and his brothers are lost, aren't they?

The phrasal verb "figure out" means to discover or to solve, to find the answer to a problem.
Examples:
- I can't figure out this mathematics problem.
- Can you figure this puzzle out?

There is another meaning for this verb, that is to understand why someone behaves the way she/he does.
An example:
- I can't figure Marie out. Sometimes she's very warm and friendly and sometimes she acts as if she doesn't know me.