Comparison of the CECILIA Faint galaxy metallicities (pink squares and shaded rectangles) to the KBSS MZR at z ∼ 2 (black circles), where metallicities were inferred using the K. Nakajima et al. (2022) O3-based calibration for consistency with the CECILIA Faint sample. The solid green line shows the median of 10,000 bootstrap fits to the KBSS sample, and the shaded regions indicate the 1σ, 2σ, and 3σ prediction regions, from darkest to lightest, derived from the bootstrap ensemble after augmentation with the measured KBSS intrinsic scatter (0.10 dex). The purple line and shaded region show the K. Nakajima et al. (2022) fit to our data and its 1σ uncertainty. The two lowest-mass CECILIA Faint galaxies that drive the MZR slope are inconsistent with the KBSS MZR.