[rules-users] Fusion , timing and streams

Hi guys, I was experimenting with Drools fusion (last version) and I have a small question : What is the difference between the following (down the page) two rules : (note the "and" between the patterns) , i.e : how one can understand the "and" , is it a logical or temporal conjunction ? and finally what is the implied "relation" between pattern as in rule "b" ? I think it is an "and" , but using drools fusion to detect 2 stocks having a temporal relation (using the after op.) , I found different results when explicitly using "and" between the patterns and not using it. One final question , what is the default event policy in fusion ? I can not find any docu about that. Thank you for your time -k rule "a" when --pattern1 and --pattern2 then --action end rule "b" when --pattern1 --pattern2 then --action end