Is the following a factual statement?
"Chisinau exists as the capital of the country Moldova."
Options:
- yes
- no
yes
The sentence is true because geographic records and maps indicate it is.

Claim: "Mathematical optimization involves taking away numbers until things are simplified."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
no
Mathematical optimization finds a way to do the same thing faster with less resources.

Is the following a factual statement?
"Charles Darwin visited the Galapagos Islands which helped him to devise his theory of Evolution."
Options:
- yes
- no
yes
His expaditions to the Galapagos Islands were recorded in detail and can be read online.

Is the following statement true?
"Sun Tzu thought about how war should be conducted."
yes
Sun Tzu was a political theorist known for thinking about war strategy.