This seems to produce the desired results, indirectly.
I tried adding several additional criteria; kind is PDF, Name begins with Gas, Item is indexed. All produced duplicates, the Kind produced 4 duplicates.
Running the filter duplicates rule, does what it says. But why is it necessary? It doesn’t seem like I’d be the only one trying to accomplish this.
Any suggestions as to a better way of doing this? Possibly including resolving my direct scanner issue. BTW, I have a flatbed scanner on the same network and while I haven’t yet scanned with it in DT3, I can reliably open it. The Brother is a sheetfed duplexing scanner, which is necessary for processing a stack of mail.