9.2 Inserting a subtype: Abstract
The next thing, of course, is to add the "Abstract" type as an immediate subtype of "Universal", alongside "Physical". That way, we make it clear that the two are a dichotomy.
Give it a name
In the dialog box that appears, type the name "Abstract":
Then click "OK".
You should now have an ontology that looks like this:
The Physical/Abstract dichotomy has been codified and formalized. This is the first step to a coherent ontology. Congratulations!
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