[quote=@whizzball1]
<Snipped quote by Etcetera>

-Soren- In that case, the first action we use could be tailored to work if a rule were changed for another action.
-Ruby- That would be kind of complicated.
-You said it!
-Soren- Why not two actions, then? Invalidating one guarantees the other to work.
[/quote]

The whole system may be shut down.