Marginalised probability distribution of the IGM parameters of the disfavoured models for a constant exclusion likelihood. The red and blue curves refer to the Single-z and Joint-z cases at z = 9.1, respectively. The solid curves represent results from the main text, while the dashed refers to cases where we have used ℒ_{ex, single − z}(θ, z = 9.1) = 0.5 and ℒ_{ex, joint − z}(θ, z = 9.1) = 0.5.