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.
This justifies what answer for what question? Q & A:
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
yes