I found the computerphile video odd, for reason's I hope I can elucidate below: 1) It seemed to suggest that the increased precision given by this approach is

I found the computerphile video odd, for reason's I hope I can elucidate below: 1) It seemed to suggest that the increased precision given by this approach is somehow surprising. It totally isn't? I mean, the difference between taint-all (poison) and this approach is in the branching factor, you don't have to run the experiment to see the outcome? 2) The choice of FIFO is very weird (I don't really care about the case law.) For a given branching factor, surely there are numerous schemes that could be considered, and they don't seem to discuss the merits of any others. Off the top of my head LIFO seems to correspond much more naturally to intuition, but I think there is a better answer than that. If a untainted priority scheme was used, whereby tainted coins were always spent last from a given balance, then this would have the effect of keeping the taint as close as possible to the original thief, and separates the bizarre relationship between cash-flow and culpability that FIFO introduces.