Further, assume that X mediates between Λ and Λ′ (third diagram below).
I can’t tell if X is supposed to be another variable, distinct from X_1 and X_2, or if it’s suppose to be X=(X_1,X_2), or what. EDIT: From reading further it looks like X=(X_1,X_2). This should be clarified where the variables are first introduced. Just to make it clear that this is not obvious even just within the field of Bayes nets, I open up Pearl’s “Causality” to page 17 and see “In Figure 1.2, X={X_2} and Y={X_3} are d-separated by Z={X_1}”, i.e. X is not assumed to be a vector (X_1, X_2, …). And obviously there is more variability in other fields.
I can’t tell if X is supposed to be another variable, distinct from X_1 and X_2, or if it’s suppose to be X=(X_1,X_2), or what. EDIT: From reading further it looks like X=(X_1,X_2). This should be clarified where the variables are first introduced. Just to make it clear that this is not obvious even just within the field of Bayes nets, I open up Pearl’s “Causality” to page 17 and see “In Figure 1.2, X={X_2} and Y={X_3} are d-separated by Z={X_1}”, i.e. X is not assumed to be a vector (X_1, X_2, …). And obviously there is more variability in other fields.
Edited, thanks.