EDG said:It doubles the probably from what value and to what value though?
I suspect that we're not talking about space suddenly being filled with In worlds, but rather that it's gone from something like 2% to 4%. Which isn't really a big deal.
Its a probability. It doubles the probability that any given planet will be type In.
As to absolute %, I haven't run it yet....but, consider the conditional probability per subsector....that will go way up with 40 iterations even if it is a bump from 2% to 4%. And the individual probability change (in this case double) is the minimum change in the expected result.
Conditional probabilites are generally poorly considered or understood. A famous example (to me, at least) is in the old comuter game of harpoon. There was somthing like a 1% chance per game second of picking up a false echo of a sub when none was present: which meant that one got several false reports every minute; way more than the liklihood of detecting a sub when surfacing or damaged at minimum range. AND annoying as hell.