At the moment, we implemented basic conflict resolution strategies for the collider rule stage in the PC algorithm (orientation rules -> collider test), namely:
KEEP_FIRST: If an edge in an unshielded triple has been oriented as a collider and it is then attempted to be oriented as part of a second unshielded triple, the first orientation is kept and the other edge in the second unshielded triple is not oriented.
KEEP_LAST: Works analogously with flipped order.
However, there are several enhancements that can be implemented:
If an edge is trying to be oriented as part of a second unshielded triple and the orientations are compatible, i.e. x -> z <- y and x -> a <- y, orient both and not just the first or the last.
At the moment, we implemented basic conflict resolution strategies for the collider rule stage in the PC algorithm (orientation rules -> collider test), namely:
However, there are several enhancements that can be implemented: