12

Prag 12
It will be unnecessary to go into futher details of his vision of probability since this statement by itself conflict with the logical axim that knowledge cannot be extracted from ignorance. For support one knows that a certain ring carries a stone but is utterly ignorant whether it is a diamond of not and also whether it is large or not. Then these being contingencies egalement possibilites their probabilities are the same and consequential by the probability of the stone being a large diamond much upon any rule for combining probabilites be different. Hence the probability of this compount event is not the probability that attashes to that of which we are absolutely ignorant and thus the two ignornaces produce knowledge. There are other well known inconsistences in LaPaces idea of probability.