you can't stop lying can you?

you are using heuristic analysis, which is NOT a deterministic relationship.
your tool identfies the *likely true spend
at a certain (undefined) probability 

and it does it no better than random chance
(but automatically! 🙄)

I suggest if you're actually interested in operating in good faith you prioritize telling the user the probability your heuristic analysis is accurate.
ie, the odds an old ouput decoy WOULD be used in a ring etc 

 thank you, that (final paragraph) is excellent feedback and a very good idea