**Q**
Does the following sentence make sense?
"John D. Rockefeller established Standard oil."
Options:
- yes
- no
**A**
yes
In 1870, John D. Rockefeller established Standard Oil, which by the early 1880s controlled some 90 percent of U.S. refineries and pipelines.


Does the following sentence make sense?
"J. Edgar Hoover launched an investigation in to Barack Obama."
Options:
- yes
- no
no
J. Edgar Hoover died in 1972 when Barack Obama was a young child.


**Q**
Claim: "Upton Sinclair wrote nearly 100 books and other works in several genres."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no
**A**
yes
The sentence is true because there are physical books that he wrote available publically for people to read. His name is on the cover of these books.


Is the following statement true?
"Smoking makes food taste better and it is an easy method to cook food."
yes
This is true because smoked food is well cooked and more spices can be added to make it more tasty.


**Q**
Is the following sentence factually correct?
"Frost occurs mainly during the summer."
Options:
- yes
- no
**A**
no
Frost happens when it is cold, and summer is the hottest time of the year.


**Q**
Yes / no, is the following a verifiable fact?
"Martha Washington became president of the United States."
**A**
no
There has never been a female president in America.