In Drupal Commerce - Rules configuration. What is the default operator in the conditions section? I'm setting up Drupal Commerce in the checkout Rules section. But this question also applies to any Rules. 

Currently I have 3 conditions in my rule set. By default what is the default operator in this section? Is it an OR or AND? I see you can add these in manually, but it would be good to know what they are by default. 


  Data comparison   
  
  Entity exists by property
  
  Data comparison
AND

And here's some filler text to get me over the 30 character minimum.