Linda: If there is the possibility that X exists, there may never be any evidence uncovered until someone goes to look for it.Here's an example of invalidation:

RAZD: Obserrvation: No living Ivory Billed Woodpeckers have been observed for over 50 years, longer than any individual Ivory Billed Woodpecker is known to live.

Theory: Ivory Billed Woodpeckers have gone extinct and no longer exist.

Falsification test: find an Ivory Billed Woodpecker

Jeanie: EXACTLY!!!! How are you going to find God unless you go looking for Him??? EH??? Got you there!