Copy a scene with duplicate variables unlinked to the original variables

A variable maintains its value until a trigger changes it. Thus, it might be possible to reset the variables when the user goes to a new scene. However, that depends on how the different scenes are accessed, how the variables are used and displayed, and whether the user might revisit slides where they'd expect to see a value based on what was done in that scene. 

Personally, I'd create separate sets of the variables. A good naming convention would help keep things straight. For example, all the variables in a given scene could start with the scene number ("1_this"; "1_that"; etc.).

So here's my recommendation. First, be sure the initial variables have names that indicate their scene. Then create the duplicate variables with names that indicate their scene. Adjust their defaults, as needed. Then go through the duplicated scene and switch to the appropriate variables in the triggers.

Yes, that's tedious. But I think it'll be simpler overall to troubleshoot and to maintain.