which feynman lecture is he referencing (on diffusion)? edit: there's one called "#43 Diffusion (5/1/62)" here: https://www.feynmanlectures.caltech.edu/flptape

which feynman lecture is he referencing (on diffusion)? edit: there's one called "#43 Diffusion (5/1/62)" here: https://www.feynmanlectures.caltech.edu/flptapes.html#restore https://www.feynmanlectures.caltech.edu/flptapes.html#restor... so I assume that