To: | "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx> |
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From: | Alex Shkotin <alex.shkotin@xxxxxxxxx> |
Date: | Tue, 3 Dec 2013 17:20:52 +0400 |
Message-id: | <CAFxxROTdmzVLdK05itnDwU783YipVqor6E6nXKG8O9NhGoUfyg@xxxxxxxxxxxxxx> |
Pat, sometimes it's useful to build axiomatic theory of application area (3D-shapes in space logic in your case?).
We need to get primary ("primitive") set of terms and write axioms of application area. Definition is a way to introduce new "secondary" term in such a way that it may be eliminated from the formulas.
In your case if "part" is primary and properPart is secondary then D8 is a definition. But if "properPart" is primary too then D8 is an axiom.
Alex 2013/12/2 Patrick Browne <patrick.browne@xxxxxx>
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