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| - concept Animal kind_of Organism |
| + concept Animal kind-of Organism |
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| - This sentence states that 'Animal' is a subconcept of 'Organism'. In other words, every animal is an organism. The term 'kind_of' is a reserved word (sometimes referred to as "isa"). The sentence is considered an axiom because it is asserting a rule, or relationship, that is assumed to hold between 'Animal' and 'Organism'. Namely, that being an animal implies being an organism. |
| + This sentence states that 'Animal' is a subconcept of 'Organism'. In other words, every animal is an organism. The term 'kind-of' is a reserved word (sometimes referred to as "is-a"). The sentence is considered an axiom because it is asserting a rule, or relationship, that is assumed to hold between 'Animal' and 'Organism'. Namely, that being an animal implies being an organism. |
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| - concept Animal kind_of Organism |
| + concept Animal kind-of Organism |
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| - concept Animal kind_of Organism |
| - concept Animal kind_of not Plant |
| + concept Animal kind-of Organism |
| + concept Animal kind-of not Plant |
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| - concept Animal kind_of Organism and not Plant |
| + concept Animal kind-of Organism and not Plant |
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| - CONCEPT animal KIND_OF organism AND NOT plant |
| + CONCEPT animal KIND-OF organism AND NOT plant |
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| + |
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| + Another type of concept axiom that can be expressed in sparrow is equivalence among concepts. For example, consider the following sentence. |
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| + {{{ |
| + concept Macromolecule same-as Molecule and consistsOf at-least 100 Atom |
| + }}} |