In visual perception, our minds must solve the reverse optics problem, which is under-determined. In other words, there are multiple [ Select ] hypotheses posteriors likelihoods data that explain the [ Select ] likelihoods data posteriors hypotheses produced by your sense organs, and not enough information to distinguish between them. Your mind addresses this problem by relying on assumptions, which are called [ Select ] posteriors data hypotheses priors , in Bayesian terms.