Matt’s paper challenges the conventional reporting of crystal symmetry in perovskite oxynitrides through exploration of the crystal structure of CaW(O,N)₃, which we synthesize for the first time. Traditional literature simplifies perovskite oxynitrides by using high-symmetry unit cells with fractional anion occupancy (e.g., sites comprised of 50% O and 50% N). While these models provide a convenient approximation, they can never accurately reflect the true nature of perovskite oxynitrides. We use complementary X-ray and neutron diffraction techniques and Reitveld refinement with numerous literature-derived and computationally-derived structures to bring unique insight into sources of disorder that are not captured within the traditional structural models. Congratulations Matt!