Just curious… I’ve seen this X1/X2 convention before for CA roots. Does anyone know the origin or rationale for this?
Now we have a “Y” generation showing up, but it seems like whoever thought of “X” didn’t anticipate more than three generations, or they would have used A1/A2.
Now we have a “Y” generation showing up, but it seems like whoever thought of “X” didn’t anticipate more than three generations, or they would have used A1/A2.