Is this sound theory?

1. Jul 2, 2006

sneez

i found this link and this guy claims there is something called degree of certainty in probability. However, it does not show up in any math book i own. is it valid theory or at least sound?

sneez

2. Jul 2, 2006

0rthodontist

It looks like he just means "probability."

3. Jul 2, 2006

HallsofIvy

Unfortunately, while his formula involves "degree of certainty" and, in several examples, he gives the "degree of certainty", he never bothers to actually define "degree of certainty"!

4. Jul 2, 2006

sneez

i found degree of certainty in paragraph 4: