Program music 1970s in particular experimented with program music, among which was Rush's "Jacob's Ladder" (1980), which shows clear influences of Smetana's "Má vlast" ("My Homeland") (1874-1879). In addition, Rush's songs "Xanadu", "Red Barchetta", and "YYZ" also show their experimentalism with program music, as do parts of "2112", particularly the discovery scene. Composers and some theorists argue that there is indeed no such thing as true "absolute ("ars gratia artis") music" and that music always at least conveys or evokes emotions. While non-professional listeners often claim that music has meaning (to them), "new" musicologists, such as Susan McClary (1999), argue that so-called
Ars Conjectandi Colin Maclaurin. Jacob's program of applying his art of conjecture to the matters of practical life, which was terminated by his death in 1705, was continued by his nephew Nicolaus Bernoulli, after having taken parts verbatim out of "Ars Conjectandi", for his own dissertation entitled "De Usu Artis Conjectandi in Jure" which was published already in 1709. Nicolas finally edited and assisted in the publication of "Ars conjectandi" in 1713. Later Nicolaus also edited Jacob Bernoulli's complete works and supplemented it with results taken from Jacob's diary. Pierre Rémond de Montmort, in collaboration with Nicolaus Bernoulli, wrote a book on