Take the following as truth: Ghirlandaio, master teacher of Leonardo da Vinci, decorated the Sassetti Chapel (far right of the high altar) with frescoes of St. Francis, and the Adoration of the Shepherds on the altar is considered his masterpiece.
Then the following statement: "The Adoration of the Shepherds is Ghirlandaio's masterpiece." is true, false, or inconclusive?