That's what I did - the only one that HAS to be combined on the research table is mortuus, which is a bit of an oversight by Azanor (although, you know, it's Azanor. I can hardly criticize), which could be easily fixed by removing corpus from bones.I actually found this out in my last world. I'm going to try to get most aspects learned through this way in my current world, combining as few aspects as possible in the research table