Quadrilateral - Sigma Knowledge base Browser

appearance as argument number 1

(documentation Quadrilateral EnglishLanguage "Any four-sided Polygon.")	Mid-level-ontology.kif 5216-5216
(externalImage Quadrilateral "http://upload.wikimedia.org/wikipedia/commons/ thumb/ d/ d4/ Square_diagonals.svg/ 250px-Square_diagonals.svg.png")	pictureList.kif 1223-1223	"http://upload.wikimedia.org/wikipedia/commons/thumb/ d/ d4/ Square_diagonals.svg/ 250px-Square_diagonals.svg.png" is a URL depicting quadrilateral
(subclass Quadrilateral Polygon)	Mid-level-ontology.kif 5215-5215	Quadrilateral is a subclass of polygon

appearance as argument number 2

(subclass Rectangle Quadrilateral)	Mid-level-ontology.kif 5222-5222	Rectangle is a subclass of quadrilateral
(termFormat EnglishLanguage Quadrilateral "quadrilateral")	domainEnglishFormat.kif 8472-8472	"quadrilateral" is the printable form of quadrilateral in english language

antecedent

(=>
    (instance ?QUAD Quadrilateral)
    (equal
        (CardinalityFn
            (KappaFn ?SIDE
                (sideOfFigure ?SIDE ?QUAD))) 4))

Mid-level-ontology.kif 5218-5220

If a geometric figure is an instance of quadrilateral,
then the number of instances in the class described by an one dimensional figure is equal to 4

consequent

(=>
    (instance ?X FourPosterBed)
    (exists (?SHAPE)
        (and
            (attribute ?X ?SHAPE)
            (instance ?SHAPE Quadrilateral)
            (forall (?CORNER)
                (=>
                    (and
                        (pointOfIntersection ?SIDE1 ?SIDE2 ?CORNER)
                        (sideOfFigure ?SIDE1 ?SHAPE)
                        (sideOfFigure ?SIDE2 ?SHAPE)
                        (not
                            (equal ?SIDE1 ?SIDE2)))
                    (exists (?POST ?FLOOR)
                        (and
                            (meetsSpatially ?CORNER ?POST)
                            (instance ?POST Artifact)
                            (instance ?FLOOR Floor)
                            (orientation ?BED ?FLOOR On)
                            (orientation ?POST ?FLOOR Vertical))))))))

Mid-level-ontology.kif 4546-4565

If an object is an instance of four-poster bed,
then there exists a geometric figure such that the geometric figure is an attribute of the object and the geometric figure is an instance of quadrilateral and for all a geometric point
- if an one dimensional figure point of intersection another one dimensional figure for the geometric point and the size of the geometric figure is the one dimensional figure and the size of the geometric figure is the other one dimensional figure and the one dimensional figure is not equal to the other one dimensional figure,
- then there exist another object and a third object such that the geometric point meets the other object and the other object is an instance of artifact and the third object is an instance of floor and a fourth object is on to the third object and the other object is vertical to the third object

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