Oh don’t get me on a rant about that! Sooo many times I’ve wanted doubled-up / tripled-up facts to be split. 
For a refresher on the Proof field enhancement requests, the two recent ones are:
- ‘Fact Colour Coding’ by @EmmaHP … Fact Colour Coding
- ‘Add “Hypothesis” to “Proof” options list’ by @TeriMollison … Add "Hypothesis" to Fact "Proof" option list
Those two, plus being able to reference Proof values for reports would be such a tremendous asset.