Degeneracy of CH₃Cl, CH₃F, and H₂CS as potential model extensions. Top: normalized posterior distributions for each molecule in the sulfur-species models. The posteriors are taken from the models listed in the last three columns of Table 3. The solid lines represent the median value, while the dashed lines describe the corresponding 1σ intervals. Bottom: comparison of absorption cross-sections as a function of wavelength at a temperature of 400 K and a pressure of 1 bar over the wavelength-range of the JWST observations used in this study.