It seems to be whitened, so as long as there is some random information, it will produce good random numbers (but maybe slowly). The idea is cool: like how to

It seems to be whitened, so as long as there is some random information, it will produce good random numbers (but maybe slowly). The idea is cool: like how to get a random flips out of a biased coin, as long as each flip is independent. You flip the coin twice, repeatedly for as long as you obtain two equal results. Upon your first encounter of two different results, you map (tails,head) to tails and (head,tails) to head. That way you obtain an unbiased toss.