Yes / no, is the following a verifiable fact?
"Orange County, California harbors the city of Los Angeles in southern California."

Let me think out loud. Orange County, California is a county in the southern area of the state of California. The answer is yes.

Yes / no, is the following a verifiable fact?
"Black pepper a common spice used in many recipes from around the world."

Let me think out loud. Black Pepper has grown quite the popularity and is used in numerous recipes throughout the globe. The answer is yes.

Yes / no, is the following a verifiable fact?
"Architects classify Roman numerals into the Doric, Corinthian, and Ionic styles."
Let me think out loud. Doric, Corinthian, and Ionic styles are types of columns, not types of Roman numerals. The answer is no.