 Boole’s ideas were conceived independently of earlier anticipations, like those developed by G.W. Leibniz. They emerged from the particular contexts of English mathematics (see Peckhaus 2009). According to Víctor Sánchez Valencia, the tradition that originated with Boole came to be known as the algebra of logic since the publication in 1879 of Principles of the Algebra of Logic by Alexander MacFarlane (see Sánchez Valencia 2004: 389). MacFarlane considered “the analytical method of reasoning about Quality proposed by Boole” as an algebra (see MacFarlane 1879: 3).