Modus ponens can be defined in a few ways.
If you take the binary logic definition:
A - B means ~A v B
you can translate this into probabilities but the result is a mess. I
have analysed this in detail but it's complicated. In short, this
definition is incompatible with probability
I mean this form
http://en.wikipedia.org/wiki/Modus_ponens
i.e.
A implies B
A
|-
B
Probabilistically, this means you have
P(B|A)
P(A)
and want to infer from these
P(B)
under the most direct interpretation...
ben
On Wed, Jun 4, 2008 at 12:08 AM, YKY (Yan King Yin)
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