A survey of 400 waitresses in Australia showed that blonds made 7% more than their dark or red haired counterparts.
no
Yes / no, is the following a verifiable fact?
"Blonds make less money than people with dark or red hair."
Explanation and answer: The rocket launch was a success and was the first commercial spacecraft to board the ISS.
no

The corresponding question: Yes / no, is the following a verifiable fact?
"SpaceX first launch of Falcon 9 was unsuccessful in May 2012."
For superior service, one can choose Delta Air Lines First Class option.
yes
Is the following sentence factually correct?
"On Delta Air Lines one can fly first-class."
Options:
- yes
- no
Explanation and answer: Führer is a title that means "leader" in German.
yes

The corresponding question: "Angela Merkel is the current Führer of Germany."
Is the above claim true?
Options:
- yes
- no
On December 1941 Pearl Harbor was indeed attacked.
yes
Claim: "Attack on Pearl Harbor happened on December 1941."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
Adrenaline is a hormone that secretes from the adrenal gland during stressful situations.
yes
Is the following sentence factually correct?
"Adrenaline kicks the heart rate up during stressful situations."
Options:
- yes
- no