[rules-users] Question on setting globals

Hi, I've been reading the Drools documentation where it is mentioned that "It is strongly discouraged to set (or change) a global value from inside your rules. We recommend to you always set the value from your application using the working memory interface." What is the reason for this? Also, in the example shown, are you not modifying the global? Isn't it what is discouraged? * global java.util.List myGlobalList; * * rule "Using a global" * when * eval( true ) * then * myGlobalList.add( "Hello World" ); * end Thanks, Seema