Profile likelihood for log₁₀|f_R0| where FORGE is used to create data fitted by e-Mantis with baryons in the optimistic setting of WL. The square points show Δχ² from the best-fit indicated by a diamond. The 95.5% confidence interval from the 1D marginalised posterior is shown as the error bar. The vertical dotted line indicates the input value of −log₁₀|f_R0| = 5.301. We see that the 1D marginalised posterior is shifted to smaller values of log₁₀|f_R0|.