(October 12, 2016 at 10:48 am)RoadRunner79 Wrote: How do you calculate what you do not know?
Qualitatively.
I don't know if there are any unicorns, and I do not know the number of grains of sand on Earth. However, if A tells me he saw a unicorn, and B tells me he saw a grain of sand, I can pretty easily tell you which one I consider more probable.