Will someone please take the time and replace the sentence from Expert
4.8.1, Rule Attributes (on activation-group), as given below.
Thanks
Wolfgang
In other words, the first rule in an activation-group to fire will
cancel the other rules' activations, i.e., stop them from firing.
===>
More precisely, the first rule in an activation-group to fire will
cancel all pending activations of all rules in the group, i.e., stop
them from firing.