Is the following statement true?
"In Iron Man Robert Downey Jr. plays the main character."

Let me think out loud. Robert Downey Jr. plays the role of Iron Man in the movie. The answer is yes.

Yes / no, is the following a verifiable fact?
"Hurricane Harvey caused landfall on Texas and Louisiana in August 2017, resulting in catastrophic flooding and more than 100 deaths."

Let me think out loud. Hurricane Harvey was the first major hurricane to make landfall in the United States since Wilma in 2005, ending a record 12-year span of a major hurricane throughout the country. The answer is yes.

Does the following sentence make sense?
"Heraclitus produced no written works during his lifetime."
Options:
- yes
- no
Let me think out loud. Heraclitus produced one written work, which was written on papyrus. The answer is no.