]> 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. LogicalConnectives-Fundamental-Topic logical connectives fundamental topic

equals The binary identity relation. <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViAyZwpEbGdrcN5Y29ycA" class="cyc_term">equals</a> THING1 THING2)</code> means that <code>THING1</code> and <code>THING2</code> are "numerically" (as opposed to "qualitatively") identical, i.e. they are one and the same thing. A sentence of the above form is true if and only if the terms occupying the two argument-places of '<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViAyZwpEbGdrcN5Y29ycA" class="cyc_term">equals</a>' denote the same thing. equivalent object

False An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjjupwpEbGdrcN5Y29ycA" class="cyc_term">TruthValue</a> (q.v.). <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2JwpEbGdrcN5Y29ycA" class="cyc_term">False</a> is the logical notion of falsehood. That is, the term '<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2JwpEbGdrcN5Y29ycA" class="cyc_term">False</a>' is used as a sentential constant of CycL that is false under every model theoretic interpretation. For example, (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwP1T85wpEbGdrcN5Y29ycA" class="cyc_term">booleanResult</a> T/F <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2JwpEbGdrcN5Y29ycA" class="cyc_term">False</a>) means that the result obtained from the true-or-false test T/F is False. Cf. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2ZwpEbGdrcN5Y29ycA" class="cyc_term">True</a>. false

Evaluate A binary <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rDeDIGEW0EdaAAACgydogAg" class="cyc_term">MetaLanguagePredicate</a> that relates a thing to a thing that is known to denote it. <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> THING TERM)</code> means that <code>TERM</code> evalutes to <code>THING</code>: the Cyc system "knows" that <code>TERM</code> denotes <code>THING</code>. Note that <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> is <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv2YOc5wpEbGdrcN5Y29ycA" class="cyc_term">notAssertible</a> (q.v.). Its most common uses are in rules or queries, with its first argument-place filled (syntactically speaking) with a variable. In a query, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> is typically used to establish a binding between such a variable and an evaluatable expression. If VAR is a variable, a literal of the form <code>(<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> VAR TERM)</code> is satisfied by an HL module that evaluates <code>TERM</code> and binds <code>VAR</code> to the result. For example, the literal '<code>(<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> ?SUM (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViArpwpEbGdrcN5Y29ycA" class="cyc_term">PlusFn</a> 1 2))</code>' would bind '<code>?SUM</code>' to 3. If <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a>'s arg1 position is filled instead with a closed expression, then the HL module checks to see if the arg2 term evaluates to the denotatum of that arg1 expression. For example, if asked the sentence '<code>(<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwDr6bZwpEbGdrcN5Y29ycA" class="cyc_term">evaluate</a> 3 (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViArpwpEbGdrcN5Y29ycA" class="cyc_term">PlusFn</a> 1 2))</code>' the system will return '<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2ZwpEbGdrcN5Y29ycA" class="cyc_term">True</a>'. evaluate

True An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjjupwpEbGdrcN5Y29ycA" class="cyc_term">TruthValue</a> (q.v.). <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2ZwpEbGdrcN5Y29ycA" class="cyc_term">True</a> is the logical notion of truth. That is, the term '<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2ZwpEbGdrcN5Y29ycA" class="cyc_term">True</a>' is used as a sentential constant of CycL that is true under every model theoretic interpretation. For example, (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwP1T85wpEbGdrcN5Y29ycA" class="cyc_term">booleanResult</a> T/F <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2ZwpEbGdrcN5Y29ycA" class="cyc_term">True</a>) means that the result obtained from the true-or-false test T/F is True. Cf. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA2JwpEbGdrcN5Y29ycA" class="cyc_term">False</a>. true

LogicalConnectives-Fundamental-Topic logical connectives fundamental topic A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwIE23ZwpEbGdrcN5Y29ycA" class="cyc_term">TimeDependentCollection</a> (q.v.). This is the collection of all and only those collections <code>COL</code> such that any thing's being an instance of <code>COL</code> depends on the current state of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjqoZwpEbGdrcN5Y29ycA" class="cyc_term">CycKB</a>. Such a <code>COL</code> corresponds to a property defined (at least partly) in terms of the contents, features, or implementation of the Cyc Knowledge Base itself, as opposed to a property that "exists out there" in the KB-independent world. For example, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvV281JwpEbGdrcN5Y29ycA" class="cyc_term">CycLAssertion</a> is a KB-dependent collection, membership in which requires of a given CycL sentence that it has in fact been asserted to the KB. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViAoJwpEbGdrcN5Y29ycA" class="cyc_term">CycLSentence</a> is also KB-dependent, as being a CycL sentence requires being composed (ultimately) out of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvu6KTZwpEbGdrcN5Y29ycA" class="cyc_term">CycLReifiedDenotationalTerm</a>s (and perhaps variables) -- i.e. terms that are currently reified in the KB. Conversely, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv5ddsJwpEbGdrcN5Y29ycA" class="cyc_term">Sentence</a> is not a KB-dependent collection. See also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvip9N5wpEbGdrcN5Y29ycA" class="cyc_term">KBDependentRelation</a>. KB dependent collection KBDependentCollection A <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rAmoSCGJbQdiSXZJvYiNhkQ" class="cyc_term">CycVocabularyTopic</a> and a <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rtGXkHpNaEdqAAAACs0uFOQ" class="cyc_term">KBDependentCollection</a>. Fundamental-Topic fundamental-topic CycVocabularyTopic An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvprlOZwpEbGdrcN5Y29ycA" class="cyc_term">FacetingCollectionType</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rAmoSCGJbQdiSXZJvYiNhkQ" class="cyc_term">CycVocabularyTopic</a> is a collection of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>s falling under a topic for which some Cyc Vocabulary exists. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a> is neither a strict [<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvcZ1FpwpEbGdrcN5Y29ycA" class="cyc_term">facets_Strict</a>] nor a covering [<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv86JWpwpEbGdrcN5Y29ycA" class="cyc_term">facets_Covering</a>] faceting of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>: many <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>s may be instances of no <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>, or of multiple <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>s. cyc vocabulary topic LogicalConnectives-Fundamental-Topic logical connectives fundamental topic