How to Solve a Bomb

4th wire: no cut because red is above
3rd wire: it wants to be cut because its red, and doesnt have red above it, but green negates it.
2nd wire: no cut because it's green
1st wire: cut because no red above it.

seems pretty clear-cut to me. i dont think priority should matter if you go through it both forwards and backwards.

e: damn it, fogel beat me to explaining it. but yeah, he got it.

ee: oh wait i think it should be clear that the first rule isnt "only red". in the OP, the "else, don't cut" is at the very end, and will remain at the very end. so, yeah, no overriding there either.