What are you using it for?
I was using for a smelter that requires both coal and ore to function.
You could just check one variable, and if that is true check the second. Then if that is true do the desired event.
I understand what you're saying. I've already used that system for upgrades.
My problem was trying to enable large quantities of coal and iron to be smelted.
For example: it first checks for 100 coal & ore, then 50, then 10, and so on.
I had already done something similar with enabling resources to be quickly transferred into a "team stockpile". However, doing the same while simultaneously checking two different variables proved to be rather messy and unnecessary.
At any rate, I've had to work around it, but I have fixed the problem.
Thanks for the help nonetheless.