Is the following sentence factually correct?
"Cancún acts as the business and financial district of Mexico and is involved in world trade."
Options:
- yes
- no

Let me think out loud. Cancún has nothing to to with business, it is a vacation area. The answer is no.

Is the following a factual statement?
"Hounds purr when you scratch them behind the ears."
Options:
- yes
- no

Let me think out loud. Hounds are a type of dog, they don't purr like cats. The answer is no.

Claim: "Pulmonology focuses on the study of the heart-lung system."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
Let me think out loud. Pulmonology is a medical field in which doctors focus on the mechanics of heart-lung interactions. The answer is yes.