Is there an equivalent of “Not ” in symbology categories with unique values, many fields

I would like to symbolise based on 2 date fields (d1,d2) in a layer. I would like to be able to have 3 different symbols:

1. d2 is NOT null
2. d1 is null AND d2 is null
3. dl is NOT null AND d2 is null

Is this possible at the symbology definition level? Is there a way of specifying a value <not null> or <any other values> on a per field basis as you can for <null>?