[oldbookguy]

Here is a simple, non math answer.

Two gals are gossiping;

Gal 1. Mary went out with Bill last night.
Gal. 2. Mary went out with Bill last night to make Bob mad.

Statement number 1 is fact, statement 2 is extranious and adds nothing to making number 1 any more or less correct, only adding more gossip.

Another way of looking at it, a prosecutor need only prove a crime, not a crime and a motive.

Thus Ockum's Razor.

obg