Conditions can be nested one inside each other. Nested conditions is hard, very very hard to get right. You may want to use a script, instead (yes, yes, you want to use a script). See previous chapter for Lua scripting.
When a (main) condition has nested conditions, first its (main) expression is evaluated, and its (main) actions are pushed in TODO list, then nested conditions are evaluated, and their actions pushed.
Each condition has an implied parameter "require-nested", that is by default set to "true".
When we have a condition with require-nested parameter set to "true", then ALL its nested conditions must evaluate to true (AND its expression must evaluate to true) for the condition to be evaluated to true.
If "require-nested ...
