Contour plots at the 68 and 95 percent confidence levels for the Gaussian likelihood evaluated with: a cosmology-dependent covariance matrix (black), a covariance matrix fixed at the input cosmology (blue) and covariance matrices computed at two wrong cosmologies, one with lower parameter values (Ω_m = 0.295, log₁₀ A_s = −8.685 and σ₈ = 0.776, red) and one with higher parameter values (Ω_m = 0.320, log₁₀ A_s = −8.625 and σ₈ = 0.884, orange). The gray dotted lines represent the input values of parameters.