It seems that yes, they're saying that 1 and 5 are roughly the same. Basically, why is the matter in the universe ~20% "non-dark", and not 1%, or .001%?
There’s that old joke that computer scientists think any numbers within a power of two are equal, physicists think any numbers within a power of 10 are equal, and mathematicians only distinguish between finite numbers and infinity.
Edit: and engineers are as precise as they are paid to be.
Having proved the contribution of these second and third order terms are between plus 10 and 20% over the range of interest we will multiply by a constant 1.15
> Mathematically, the 80/20 rule is roughly described by a power law distribution (also known as a Pareto distribution) for a particular set of parameters. Many natural phenomena distribute according to power law statistics. It is an adage of business management that "80% of sales come from 20% of clients." [1][2]
Could you elaborate on how this is related? To me, the 80/20 rule and the 1:5 matter ratio seem like entirely separate concepts that coincidentally share the same ratio.
Though really the issue with the comparison is that it implies that 80% (or ~83.3%) of the <something> is correlated to the light matter, and the other 20% (or ~16.7%) of the <something> is correlated to the dark matter. Maybe eventually we'll learn enough about dark matter and discover that, yeah actually, 1/6 of the life, or unobtanium, or whatever, is actually in the dark matter. But for now, I agree that the Pareto principle seems pretty irrelevant.
