Occam's razor would argue that truth should be rather easy. I think you have a valid point, but that the correlation between B and C is still very likely, even

Occam's razor would argue that truth should be rather easy. I think you have a valid point, but that the correlation between B and C is still very likely, even if A is a factor in the existence of B. For instance, if I have a particularly great lunch one day because a new guy is working the grill at a restaurant, I would claim that the new guy working the grill is the reason for my great lunch. There are, of course, many factors which go into him being there, such as the manager who chose to hire him, but it is nonetheless truthfully and directly because of him that I've had a great lunch. Similarly, a mission is relevant and increases the likelihood of an education; it doesn't mean that education is not the most direct correlation, however. Additionally, somebody pointed out how similar effects were not found when missions focused on health and poverty, for instance.