“It’s inconceivable!” This famous line and exchange from the 1987 classic film The Princess Bride, along with the fates of the characters Vizzini and Inigo Montoya, provide the fulcrum for this Journal of Clinical Oncology (JCO) editorial, which highlights the phase III TOURMALINE-MM1 trial and its seemingly “negative” findings in multiple myeloma (MM). Are we considering the inconceivable? Do we know what the word even means?