Answer the following question: Claim: "Dextromethorphan suppresses persistent cough conditions caused by throat and/or bronchial irritation."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
My answer and thoughts: The answer is yes.
Chain of thoughts: Cough suppression is the primary reason for the usage of the dextromethorphan drug.

Answer the following question: Claim: "Justin Bieber began his music career at the age of 21."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
My answer and thoughts: The answer is no.
Chain of thoughts: Justin Bieber is a famous example of a teen star.

Answer the following question: Is the following a factual statement?
"Willard Van Orman Quine married about three times in his life."
Options:
- yes
- no
My answer and thoughts:
The answer is no.
Chain of thoughts: Quine only married two times during his life.