1) swuehl/Stefan always has a point..whatever he says is authority for me....and I'm sure is authority for every community member
As you've said:"the last line from second table (4, e) will not be loaded despite the fact that 4 does not exists in TABLE1"
from QV help:
"exists Determines whether a specific field value exists in a specified field of the data loaded so far. Field is a name or a string expression evaluating to a field name. The field must exist in the data loaded so far by the script"
field value exists in a specified field: so it is not about a previous table but the field.
data loaded so far: 4 has been already been loaded in F1 when the turn for (4,e) comes to be loaded, so it is not loaded
So,it might fit in the category AI(Against Intution) but as per the categories suggested by you, it is WAD hence you can't compare it with intution as then you'll have 3 categories: