Premise: USS "Yorktown" (Gunboat No. 1/PG-1) was lead ship of her class of steel-hulled, twin-screw gunboats in the United States Navy in the late 19th and early 20th centuries. She was the second U.S. Navy ship named in honor of the American Revolutionary War's Battle of Yorktown.
Hypothesis: USS "Yorktown" (Gunboat No. 4/PG-1) was lead ship of her class