]> 2008/06/10 OpenCyc Knowledge Base Copyright© 2001-2008 Cycorp, Inc., http://www.cyc.com/, Austin, TX, USA This file contains an OWL representation of information contained in the OpenCyc Knowledge Base. The content of this OWL file is licensed under the Creative Commons Attribution 3.0 license whose text can be found at http://creativecommons.org/licenses/by/3.0/legalcode. The content of this OWL file, including the OpenCyc content it represents, constitutes the "Work" referred to in the Creative Commons license. The terms of this license equally apply to, without limitation, renamings and other logically equivalent reformulations of the content of this OWL file (or portions thereof) in any natural or formal language, as well as to derivations of this content or inclusion of it in other ontologies. externalID A unique, language-neutral, variable-sized identifier for a concept that can be used to refer unambiguously to that concept across OWL exports or across Cyc inference engines. label A natural-language representation for a concept that is both human readable and readable by the Cyc inference engine. These terms are not guaranteed to refer to the same concept across time but are guaranteed to be consistent within a particular OWL export. Use 'cycAnnot:externalID' for unambiguously referring to a concept across OWL exports or across Cyc inference engines. BilaterallySymmetricObject A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/AxisymmetricObject" class="cyc_term">AxisymmetricObject</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> is a (tangible or intangible) spatial object that is symmetric with respect to some bisecting straight line (if the object is planar) or plane (if it's non-planar). In this context, symmetric means that the line or plane divides the object into two equal halves with the same shape (or mirror-image shapes). For example, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Circle" class="cyc_term">Circle</a>, an isosceles <a href="http://sw.opencyc.org/2008/06/10/concept/en/Triangle" class="cyc_term">Triangle</a>, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Cone" class="cyc_term">Cone</a>, and a human body are all bilaterally symmetric objects. If a <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> <code>OBJ</code> is a one- or two-dimensional planar region, then any bisecting line with respect to which <code>OBJ</code> is symmetric is an axis of symmetry (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/symmetricAxes" class="cyc_term">symmetricAxes</a>) of <code>OBJ</code>. If <code>OBJ</code> is a two- or three-dimensional non-planar object that is symmetric with respect to a bisecting plane <code>PLANE</code>, then any straight line with respect to which the space-region intersection of <code>OBJ</code> and <code>PLANE</code> is symmetric is itself an axis of symmetry of <code>OBJ</code>. Thus, a circle has an infinite number of axes of symmetry (viz. any straight line that intersects the circle and passes through its center); an isosceles triangle has exactly one axis of symmetry; a cone has at least one axis of symmetry; and a human body has no axis of symmetry (though it does have three <a href="http://sw.opencyc.org/2008/06/10/concept/en/objectAxes" class="cyc_term">objectAxes</a> (q.v.)). See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/RadiallySymmetricObject" class="cyc_term">RadiallySymmetricObject</a>. bilaterally symmetric object Mx4rvVi5S5wpEbGdrcN5Y29ycA bilaterally symmetric objects bilaterally symmetrical objects bilaterally symmetrical object A specialization of both <a href="http://sw.opencyc.org/2008/06/10/concept/en/RoundObject" class="cyc_term">RoundObject</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/en/TwoDimensionalGeometricThing" class="cyc_term">TwoDimensionalGeometricThing</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/en/ClosedSurfaceRegion" class="cyc_term">ClosedSurfaceRegion</a> (qq.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipsoid" class="cyc_term">Ellipsoid</a> is a two-dimensional unbounded surface, embedded in a three-dimensional space, and such that the planar sections along its respective internal axes are <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipse" class="cyc_term">Ellipse</a>s (q.v.). Note that <a href="http://sw.opencyc.org/2008/06/10/concept/en/Sphere" class="cyc_term">Sphere</a> and its generalization <a href="http://sw.opencyc.org/2008/06/10/concept/en/Spheroid" class="cyc_term">Spheroid</a> are specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipsoid" class="cyc_term">Ellipsoid</a>. See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/EllipsoidalSolid" class="cyc_term">EllipsoidalSolid</a>, each instance of which is an (intangible or tangible) three-dimensional object whose boundary is or approximates an <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipsoid" class="cyc_term">Ellipsoid</a>. Ellipsoid ellipsoid This is the collection of all ridges that stick out from other objects. More precisely, each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ridge" class="cyc_term">Ridge</a> is a long and thin, bilaterally symmetrical, external part of some larger tangible object. A swatch of corduroy, the edge of a dime, and a Ruffles brand potato chip all have ridges as parts. For those ridges that are <a href="http://sw.opencyc.org/2008/06/10/concept/en/TopographicalFeature" class="cyc_term">TopographicalFeature</a>s, see the specialization <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ridge_Hill" class="cyc_term">Ridge_Hill</a>. And for the top of such a ridge, see <a href="http://sw.opencyc.org/2008/06/10/concept/en/RidgeLine_Topographical" class="cyc_term">RidgeLine_Topographical</a>. Ridge ridge parallelogram A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Quadrilateral" class="cyc_term">Quadrilateral</a> (q.v.). This is the collection of all four-sided polygons such that each side is parallel to its opposite side. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Parallelogram" class="cyc_term">Parallelogram</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/en/Rectangle" class="cyc_term">Rectangle</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/en/Rhombus" class="cyc_term">Rhombus</a>. Parallelogram bicycle Bicycle <a href="http://sw.opencyc.org/2008/06/10/concept/en/Bicycle" class="cyc_term">Bicycle</a> is a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/WheeledTransportationDevice" class="cyc_term">WheeledTransportationDevice</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/en/MountableTransporter" class="cyc_term">MountableTransporter</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/en/Device_UserPowered" class="cyc_term">Device_UserPowered</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/en/Device_UserControlled" class="cyc_term">Device_UserControlled</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Bicycle" class="cyc_term">Bicycle</a> is a personal wheeled transport device powered by human peddling. Most bicycles have two main wheels arranged in-line, but some tandem bicycles have more than two wheels. ellipsoid A specialization of both <a href="http://sw.opencyc.org/2008/06/10/concept/en/RoundObject" class="cyc_term">RoundObject</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/en/ThreeDimensionalGeometricThing" class="cyc_term">ThreeDimensionalGeometricThing</a> (qq.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/EllipsoidalSolid" class="cyc_term">EllipsoidalSolid</a> is a (tangible or intangible) three-dimensional object whose boundary is or approximates an <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipsoid" class="cyc_term">Ellipsoid</a> (q.v.) Examples of ellipsoidal solids include tangible objects such as jelly beans, as well as intangible <a href="http://sw.opencyc.org/2008/06/10/concept/en/SpaceRegion" class="cyc_term">SpaceRegion</a>s. See also the specialization <a href="http://sw.opencyc.org/2008/06/10/concept/en/SpheroidalSolid" class="cyc_term">SpheroidalSolid</a>. EllipsoidalSolid A specialization of both <a href="http://sw.opencyc.org/2008/06/10/concept/en/ClosedLinearObject" class="cyc_term">ClosedLinearObject</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/en/LineSegment" class="cyc_term">LineSegment</a> (qq.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipse" class="cyc_term">Ellipse</a> is a closed, one-dimensional curve that is the path of a point that moves so that the sum of its respective distances from two fixed points -- the ellipse's foci -- is constant. An important specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipse" class="cyc_term">Ellipse</a> is <a href="http://sw.opencyc.org/2008/06/10/concept/en/Circle" class="cyc_term">Circle</a>, each instance of which is an ellipse such that the distance between its foci is zero. See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/EllipticalRegion" class="cyc_term">EllipticalRegion</a>, each instance of which is a two-dimensional region whose boundary is an <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipse" class="cyc_term">Ellipse</a>. And cf. <a href="http://sw.opencyc.org/2008/06/10/concept/en/Ellipsoid" class="cyc_term">Ellipsoid</a>. ellipse Ellipse Vertebrate An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/BiologicalTaxon" class="cyc_term">BiologicalTaxon</a> within the <a href="http://sw.opencyc.org/2008/06/10/concept/en/BiologicalPhylum" class="cyc_term">BiologicalPhylum</a> <a href="http://sw.opencyc.org/2008/06/10/concept/en/ChordataPhylum" class="cyc_term">ChordataPhylum</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Vertebrate" class="cyc_term">Vertebrate</a> is an animal that has a backbone or spine made of bony or cartilaginous vertebrae, which may be separate or fused. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Vertebrate" class="cyc_term">Vertebrate</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/en/Mammal" class="cyc_term">Mammal</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/en/Reptile" class="cyc_term">Reptile</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/en/Bird" class="cyc_term">Bird</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/en/Fish" class="cyc_term">Fish</a>. vertebrate BilaterallySymmetricObject A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/AxisymmetricObject" class="cyc_term">AxisymmetricObject</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> is a (tangible or intangible) spatial object that is symmetric with respect to some bisecting straight line (if the object is planar) or plane (if it's non-planar). In this context, symmetric means that the line or plane divides the object into two equal halves with the same shape (or mirror-image shapes). For example, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Circle" class="cyc_term">Circle</a>, an isosceles <a href="http://sw.opencyc.org/2008/06/10/concept/en/Triangle" class="cyc_term">Triangle</a>, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Cone" class="cyc_term">Cone</a>, and a human body are all bilaterally symmetric objects. If a <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> <code>OBJ</code> is a one- or two-dimensional planar region, then any bisecting line with respect to which <code>OBJ</code> is symmetric is an axis of symmetry (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/symmetricAxes" class="cyc_term">symmetricAxes</a>) of <code>OBJ</code>. If <code>OBJ</code> is a two- or three-dimensional non-planar object that is symmetric with respect to a bisecting plane <code>PLANE</code>, then any straight line with respect to which the space-region intersection of <code>OBJ</code> and <code>PLANE</code> is symmetric is itself an axis of symmetry of <code>OBJ</code>. Thus, a circle has an infinite number of axes of symmetry (viz. any straight line that intersects the circle and passes through its center); an isosceles triangle has exactly one axis of symmetry; a cone has at least one axis of symmetry; and a human body has no axis of symmetry (though it does have three <a href="http://sw.opencyc.org/2008/06/10/concept/en/objectAxes" class="cyc_term">objectAxes</a> (q.v.)). See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/RadiallySymmetricObject" class="cyc_term">RadiallySymmetricObject</a>. bilaterally symmetric object A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/SpatialThing" class="cyc_term">SpatialThing</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/AxisymmetricObject" class="cyc_term">AxisymmetricObject</a> is a (tangible or intangible) spatial thing that is symmetric with respect to an axis. Such an axis, which is a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Line_Straight" class="cyc_term">Line_Straight</a>, is an axis of symmetry (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/symmetricAxes" class="cyc_term">symmetricAxes</a>) of the spatial thing. An axially symmetric object might be a <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> or a <a href="http://sw.opencyc.org/2008/06/10/concept/en/RadiallySymmetricObject" class="cyc_term">RadiallySymmetricObject</a> (qq.v.). axisymmetric object AxisymmetricObject type of object The collection of all collections that are "object-like" in at least one respect. A collection <code>COL</code> is object-like just in case there is some sense of 'part' according to which any (or nearly any) given proper part of an instance of <code>COL</code> is not itself an instance of <code>COL</code>; when this happens <code>COL</code> is said to be object-like with respect to that sense of 'part'. More precisely, for a collection <code>COL</code> to be an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/ObjectType" class="cyc_term">ObjectType</a> it is sufficient that there be some specialization <code>PARTPRED</code> of <a href="http://sw.opencyc.org/2008/06/10/concept/en/properParts" class="cyc_term">properParts</a> such that, for any <code>OBJ1</code> and <code>OBJ2</code>, if <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/isa" class="cyc_term">isa</a> OBJ1 COL)</code> and <code>(PARTPRED OBJ1 OBJ2)</code> both hold, then <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/isa" class="cyc_term">isa</a> OBJ2 COL)</code> does not hold. (Also sufficient for <code>COL</code>'s being an object-type is that there be some specialization <code>INVPARTPRED</code> of the inverse of <a href="http://sw.opencyc.org/2008/06/10/concept/en/properParts" class="cyc_term">properParts</a> (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/genlInverse" class="cyc_term">genlInverse</a>) such that <code>(INVPARTPRED OBJ2 OBJ1)</code>, with everything else remaining the same as above.) Note that neither of the above sufficient conditions for <code>COL</code>'s being an object-type is strictly necessary: some exceptions are allowed. Thus as long as either one of the above conditionals holds in nearly all cases, <code>COL</code> should be considered an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/ObjectType" class="cyc_term">ObjectType</a>. Here are two examples. Consider <a href="http://sw.opencyc.org/2008/06/10/concept/en/Automobile" class="cyc_term">Automobile</a>. Take an instance of that, say my car. Now consider one of the proper <a href="http://sw.opencyc.org/2008/06/10/concept/en/physicalParts" class="cyc_term">physicalParts</a> of my car, say the steering wheel. The steering wheel is not an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/Automobile" class="cyc_term">Automobile</a>. And the same would be true for any proper physical part of any car. So <a href="http://sw.opencyc.org/2008/06/10/concept/en/Automobile" class="cyc_term">Automobile</a> is an <a href="http://sw.opencyc.org/2008/06/10/concept/en/ObjectType" class="cyc_term">ObjectType</a>. Consider <a href="http://sw.opencyc.org/2008/06/10/concept/en/CalendarYear" class="cyc_term">CalendarYear</a>. No proper <a href="http://sw.opencyc.org/2008/06/10/concept/en/timeSlices" class="cyc_term">timeSlices</a> of a year is itself a year. So <a href="http://sw.opencyc.org/2008/06/10/concept/en/CalendarYear" class="cyc_term">CalendarYear</a> is an <a href="http://sw.opencyc.org/2008/06/10/concept/en/ObjectType" class="cyc_term">ObjectType</a>. See <a href="http://sw.opencyc.org/2008/06/10/concept/en/StuffType" class="cyc_term">StuffType</a> for the contrasting (though not disjoint) notion of being stuff-like. ObjectType BilaterallySymmetricObject A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/AxisymmetricObject" class="cyc_term">AxisymmetricObject</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> is a (tangible or intangible) spatial object that is symmetric with respect to some bisecting straight line (if the object is planar) or plane (if it's non-planar). In this context, symmetric means that the line or plane divides the object into two equal halves with the same shape (or mirror-image shapes). For example, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Circle" class="cyc_term">Circle</a>, an isosceles <a href="http://sw.opencyc.org/2008/06/10/concept/en/Triangle" class="cyc_term">Triangle</a>, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Cone" class="cyc_term">Cone</a>, and a human body are all bilaterally symmetric objects. If a <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> <code>OBJ</code> is a one- or two-dimensional planar region, then any bisecting line with respect to which <code>OBJ</code> is symmetric is an axis of symmetry (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/symmetricAxes" class="cyc_term">symmetricAxes</a>) of <code>OBJ</code>. If <code>OBJ</code> is a two- or three-dimensional non-planar object that is symmetric with respect to a bisecting plane <code>PLANE</code>, then any straight line with respect to which the space-region intersection of <code>OBJ</code> and <code>PLANE</code> is symmetric is itself an axis of symmetry of <code>OBJ</code>. Thus, a circle has an infinite number of axes of symmetry (viz. any straight line that intersects the circle and passes through its center); an isosceles triangle has exactly one axis of symmetry; a cone has at least one axis of symmetry; and a human body has no axis of symmetry (though it does have three <a href="http://sw.opencyc.org/2008/06/10/concept/en/objectAxes" class="cyc_term">objectAxes</a> (q.v.)). See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/RadiallySymmetricObject" class="cyc_term">RadiallySymmetricObject</a>. bilaterally symmetric object BilaterallySymmetricObject A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/AxisymmetricObject" class="cyc_term">AxisymmetricObject</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> is a (tangible or intangible) spatial object that is symmetric with respect to some bisecting straight line (if the object is planar) or plane (if it's non-planar). In this context, symmetric means that the line or plane divides the object into two equal halves with the same shape (or mirror-image shapes). For example, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Circle" class="cyc_term">Circle</a>, an isosceles <a href="http://sw.opencyc.org/2008/06/10/concept/en/Triangle" class="cyc_term">Triangle</a>, a <a href="http://sw.opencyc.org/2008/06/10/concept/en/Cone" class="cyc_term">Cone</a>, and a human body are all bilaterally symmetric objects. If a <a href="http://sw.opencyc.org/2008/06/10/concept/en/BilaterallySymmetricObject" class="cyc_term">BilaterallySymmetricObject</a> <code>OBJ</code> is a one- or two-dimensional planar region, then any bisecting line with respect to which <code>OBJ</code> is symmetric is an axis of symmetry (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/symmetricAxes" class="cyc_term">symmetricAxes</a>) of <code>OBJ</code>. If <code>OBJ</code> is a two- or three-dimensional non-planar object that is symmetric with respect to a bisecting plane <code>PLANE</code>, then any straight line with respect to which the space-region intersection of <code>OBJ</code> and <code>PLANE</code> is symmetric is itself an axis of symmetry of <code>OBJ</code>. Thus, a circle has an infinite number of axes of symmetry (viz. any straight line that intersects the circle and passes through its center); an isosceles triangle has exactly one axis of symmetry; a cone has at least one axis of symmetry; and a human body has no axis of symmetry (though it does have three <a href="http://sw.opencyc.org/2008/06/10/concept/en/objectAxes" class="cyc_term">objectAxes</a> (q.v.)). See also <a href="http://sw.opencyc.org/2008/06/10/concept/en/RadiallySymmetricObject" class="cyc_term">RadiallySymmetricObject</a>. bilaterally symmetric object BT <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/broaderTerm" class="cyc_term">broaderTerm</a> TERM1 TERM2)</code> means that <code>TERM2</code> is broader than <code>TERM1</code>, in an extremely general sense of "broader". For example, <code>TERM2</code> is, in the relevant sense, broader than <code>TERM1</code> if any of the following hold: <code>TERM2</code> is a collection that subsumes <code>TERM1</code>; <code>TERM2</code> is a collection that has <code>TERM1</code> as an instance; <code>TERM2</code> is a collection, instances of which have instances of the collection <code>TERM1</code> as parts; <code>TERM2</code> has <code>TERM1</code> as a part; This list of reasons for why <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/broaderTerm" class="cyc_term">broaderTerm</a> TERM1 TERM2)</code> could hold is not exhaustive, but it should give a good indication of how general the <a href="http://sw.opencyc.org/2008/06/10/concept/en/broaderTerm" class="cyc_term">broaderTerm</a> relation actually is. broaderTerm symmetry in space spatial topic SymmetryInSpace-Spatial-Topic TemporalStuffType type of temporally stuff-like thing A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/en/StuffType" class="cyc_term">StuffType</a> (q.v.) whose instances are all and only those collections that are temporally stuff-like. A collection <code>COL</code> is temporally stuff-like just in case every purely temporal part (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/timeSlices" class="cyc_term">timeSlices</a>) of an instance of <code>COL</code> is itself an instance of <code>COL</code>, unless it is a temporal part of a temporal granule of <code>COL</code> (see <a href="http://sw.opencyc.org/2008/06/10/concept/en/granuleOfTemporalStuff" class="cyc_term">granuleOfTemporalStuff</a>). More precisely, for a collection <code>COL</code> to be an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/TemporalStuffType" class="cyc_term">TemporalStuffType</a> it is both a necessary and sufficient condition that for any <code>OBJ1</code> and <code>OBJ2</code> (with <code>OBJ2</code> at or above <code>COL</code>'s temporal granularity level), if <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/isa" class="cyc_term">isa</a> OBJ1 COL)</code> and <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/timeSlices" class="cyc_term">timeSlices</a> OBJ1 OBJ2)</code>, then <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/en/isa" class="cyc_term">isa</a> OBJ2 COL)</code>. Consider <a href="http://sw.opencyc.org/2008/06/10/concept/en/WalkingOnTwoLegs" class="cyc_term">WalkingOnTwoLegs</a>. Take an arbitrary instance <code>WALK</code> of this collection (say Miss America 2000's victory walk down the runway and back); and then take an arbitrary time-slice <code>SUBWALK</code> of <code>WALK</code> that subsumes at least one instance of (the <a href="http://sw.opencyc.org/2008/06/10/concept/en/granuleOfTemporalStuff" class="cyc_term">granuleOfTemporalStuff</a> for <a href="http://sw.opencyc.org/2008/06/10/concept/en/WalkingOnTwoLegs" class="cyc_term">WalkingOnTwoLegs</a>) <a href="http://sw.opencyc.org/2008/06/10/concept/en/TakingAStep" class="cyc_term">TakingAStep</a> (say her trip back from the end of the runway). <code>SUBWALK</code> is itself an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/WalkingOnTwoLegs" class="cyc_term">WalkingOnTwoLegs</a>. So <a href="http://sw.opencyc.org/2008/06/10/concept/en/WalkingOnTwoLegs" class="cyc_term">WalkingOnTwoLegs</a> is an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/en/TemporalStuffType" class="cyc_term">TemporalStuffType</a>. See <a href="http://sw.opencyc.org/2008/06/10/concept/en/TemporalObjectType" class="cyc_term">TemporalObjectType</a> for the disjoint notion of being temporally object-like. prettyString (<a href="http://sw.opencyc.org/2008/06/10/concept/en/prettyString" class="cyc_term">prettyString</a> TERM STRING) means that STRING is the English word or expression (sequence of words) commonly used to refer to TERM. The predicate <a href="http://sw.opencyc.org/2008/06/10/concept/en/prettyString" class="cyc_term">prettyString</a> is used by the code which generates CycL to English paraphrases, but its applicability is not restricted to this use. Pretty String