The discussion centers on the possibility of a cubic function having a reciprocal without vertical asymptotes. It concludes that if a reciprocal lacks vertical asymptotes, the cubic function must have no roots, which is impossible. Therefore, all reciprocal functions derived from cubic functions will inherently have vertical asymptotes. This aligns with the mathematical properties of cubic functions and their reciprocals. Ultimately, no cubic function can exist without roots that would prevent vertical asymptotes in its reciprocal.