premise: Gin is not a spirit.
hypothesis: Gin is a spirit which derives its predominant flavour from juniper berries ( Juniperus communis ) . From its earliest origins in the Middle Ages , gin has evolved from use in herbal medicine to an object of commerce in the spirits industry . Gin is one of the broadest categories of spirits , represented by products of various origins , styles , and flavour profiles that all revolve around juniper as a common ingredient .