Well .. Suppose we have research project "tech1", and set of ufopedia topics from different categories, depending from this research: " craft weapon1", "equipment2", " tech1".
As i see, we will always got "craft weapon1" shows up when research completed. Even if we use: lookup: tech1
No matter.
But. If " tech1" is in same category with "craft weapon1", then we got it right.
Am i right?