[EmilioMartinez]

I love it! Here's more unrequested feedback and ideas

Having two conditions on the same edge was confusing because being on different sides reads like an OR. And it's too my personal preference that it be entirely pictoric (eg. the same tiny tree but drawn inside a little circle through the edge as forming a part of it, or the same but crossed out for the bone). That way AND vs OR would be easy to read too, depending on weather the icons go along the edge for AND (eg in two little circles, or maybe a bigger one split across), or the icons are on the sides of the edge (with the circle being cut by the edge)