Some density-based inference tasks can be carried out using samples without explicitly knowing the density.

“And this gives us something, M_C_M_C_ what basically the idea is that we may not be able to create the dentist density, but we are able to sample from it. And that's one of the very interesting things about kind of everything inference or like density based is that you can actually do a lot of things without”

“actually knowing the density itself, you just by sampling and rejecting samples.”