*Q:* Were Greeks essential to crafting Egyptian Lighthouse of Alexandria?
*A:* My reasoning: The Lighthouse of Alexandria was an impressive monument in Egypt. The Lighthouse of Alexandria was built by pharaoh Ptolemy II. Ptolemy II was the son of Ptolemy I Soter. Ptolemy I Soter was a Greek bodyguard of Alexander the Great and became pharaoh of Egypt.
The answer: yes.


*Q:* Is "A Tale of Two Cities" a popular science novel?
*A:* My reasoning: "A Tale of Two Cities" is a historical fiction novel. Popular science books focus on scientific facts presented to a mainstream audience. Fiction is not fact.
The answer: no.


*Q:* Is coal needed to practice parachuting?
*A:*
My reasoning: Parachuting requires a parachute. Parachutes are made from nylon. Nylon is made from coal.
The answer: yes.