Explanation and answer: Drums are musical instruments, not water purification devices.
no

The corresponding question: Yes / no, is the following a verifiable fact?
"Drums purify water using an advanced filtration system."


Explanation and answer: Gulf Oil is a large company that provides for many companies, including some international companies.
no

The corresponding question: Is the following a factual statement?
"Gulf Oil only provides oil to the Gulf of Mexico."
Options:
- yes
- no


Explanation and answer: Charles Darwin pioneered many theories that helped to observe and explain natural biological evolution over time.
yes

The corresponding question: Does the following sentence make sense?
"Charles Darwin created the modern theory of evolutionary biology."
Options:
- yes
- no


Explanation and answer: Malcolm X was a civil rights activist during his life.
yes

The corresponding question:
Is the following statement true?
"Malcolm X fought for African-American civil rights."