Known answer: no
Now, what could be the question and solution? Are leaves from coca good for gaining weight?
People who want to gain weight seek to increase caloric intake. Coca leaf contains chemicals that suppress hunger and thirst.

Known answer: yes
Now, what could be the question and solution? Would it be impossible to get to Burning Man on the Mayflower?
The Mayflower was a seafaring vessel. Burning Man is held in Black Rock Desert. There are no bodies of water flowing into the Black Rock Desert.

Known answer: yes
Now, what could be the question and solution? Is it foolish to stand on giraffe's head to see over Eiffel Tower?
The neck of a giraffe can be up to 7 feet in length. Including their necks, giraffes can be as tall as 20 feet. The Eiffel Tower is 1,063 feet tall.

Known answer: yes
Now, what could be the question and solution?
Does a person need to be a parent to become a grandparent?
Parents care for their children. When the children grow up and have kids of their own, the parents become grandparents to those kids. A person who is not a parent has no kids, therefore nobody to produce grandchildren for them.