Bayes factors from a suite of models for each HR 8799 exoplanet. See Table 1 for an explanation of the shorthand notation used to mark each model. All of the models assume Gaussian priors on R and ﹩\mathrm{log}g﹩ (see Table 2). For HR 8799b and c, the Bayesian evidence clearly favors cloudy models with non-equilibrium (unconstrained) chemistry. For HR 8799e, the lack of K-band spectroscopy implies that none of the models are strongly favored. The number associated with each histogram is the logarithm of the Bayes factor between the model in question and its neighbor below. The color bar shows the logarithm of the Bayes factor between the model in question and the best model, which is the model placed at the top of each panel.