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logicmoo

TC or not?

Aug 2nd, 2017
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Prolog 1.83 KB | None | 0 0
  1. Given:
  2.  
  3. fact1-  i:myCar rdf:type c:HondaCivic .
  4. fact2-  c:HondaCivic rdfs:subClassOf c:PassengerVehicle .
  5. fact3-  c:PassengerVehicle rdfs:subClassOf c:ThingThatCanBeInsured .
  6.  
  7. From fact1 + fact2 + fact3  may i conclude?
  8.  
  9. result1-   i:myCar rdf:type  c:PassengerVehicle .
  10. result2-   i:myCar rdf:type  c:ThingThatCanBeInsured .
  11.  
  12. No, because FOL doesnt give me this transitive closure .
  13.  
  14. So, Lets make it by adding a rule:
  15.  
  16. rule1 - { ?c rdfs:subClassOf ?sc.  ?i rdf:type ?c . } ->  { ?i rdf:type ?sc }
  17.  
  18.  
  19.  
  20. ASK> i:myCar rdf:type ?WHAT
  21.  
  22.  
  23. result1> ?WHAT = c:PassengerVehicle
  24.    proof>
  25.       rule1-             { ?c rdfs:subClassOf ?sc.  ?i rdf:type ?c . } ->  { ?i rdf:type ?sc }
  26.       fact1-              i:myCar rdf:type c:HondaCivic .
  27.       fact2-              c:HondaCivic rdfs:subClassOf c:PassengerVehicle .
  28.       rule1+fact2+fact1   c:HondaCivic rdfs:subClassOf c:PassengerVehicle .  i:myCar rdf:type c:HondaCivic .
  29.       ded1-            -> i:myCar rdf:type c:PassengerVehicle
  30.  
  31. result2> ?WHAT = c:ThingThatCanBeInsured
  32.    proof>
  33.       rule1-               { ?c rdfs:subClassOf ?sc.  ?i rdf:type ?c . } ->  { ?i rdf:type ?sc }
  34.       fact1-               i:myCar rdf:type c:HondaCivic .
  35.       fact2-               c:HondaCivic rdfs:subClassOf c:PassengerVehicle .
  36.       rule1+fact2+fact1:   c:HondaCivic rdfs:subClassOf c:PassengerVehicle . i:myCar rdf:type c:HondaCivic .
  37.       ded1-              -> i:myCar rdf:type c:PassengerVehicle .
  38.       fact3-               c:PassengerVehicle rdfs:subClassOf c:ThingThatCanBeInsured .
  39.       rule1+ded1+fact3     c:PassengerVehicle rdfs:subClassOf c:ThingThatCanBeInsured .  i:myCar rdf:type c:PassengerVehicle .
  40.       ded2-              -> i:myCar rdf:type c:ThingThatCanBeInsured
  41.  
  42.  
  43. Oh, still no TC? Perhaps not.  Since TC would have meant that the proofs would have been the same lengths?
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