Yes / no, is the following a verifiable fact?
"Matthew McConaughey works for a whiskey company."

Let me think out loud. He is an actor, who has collaborated with Wild Turkey. The answer is no.

Is the following statement true?
"Doctors prescribe Valerian root for patients who can't sleep."

Let me think out loud. Valerian root is an herb sold in health food stores. A doctor would not prescribe it. The answer is no.

Is the following a factual statement?
"Many people use Rail transport in China to travel to Australia."
Options:
- yes
- no
Let me think out loud. Australia is a separate continent from Asia, which is not reachable by rail transportation. The answer is no.