If I have well understood, the evidence “e” represents an observed “context” that we want to be true also in the counterfactual hypothesis.

In the definition of the output Y (Y = TX + I + U), as well in the definition of the counterfactual Y [x] (Y [x] = Tx + I + U ), the total causal effect of X on Y (T) does not depend on the evidence “e”.

Question: why does the total causal effect of X on Y (T) used in the formula not be dependent on the evidence “e”?

VA

PS: I apologize for my English.