How result slide detect which result variable to use

A tip for filtering out the dead variables, with the SL2 update 5+ (I'm using SL2 Update 10) where you can rename the variables as normal but still not able to delete them.

I found you can detect the orphaned variables as they will glitch a text label to not display at all if referencing an orphaned results slide variable.

So I list all my results slides variables in a hidden housekeeping slide to use meaningful names and keep on top of results slides changes now. Listing each variable in its own text box:
- "R1 - %Results1.ScorePoints%" through
- "R10 - %Results10.ScorePoints%" for instance where R10 is orphaned.

Previewing the slide:
- only the R1 - label will show
- while the orphaned R10 - label will not show at all. 

So then you can make a hit-list of the orphans and banish them to the bottom of the variables list by renaming them with Zzz prefixes.