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Term 1: Term 2:

(=>
    (and
        (offers ?AGENT ?CATALOG)
        (catalogItem ?PROP ?CATALOG)
        (subclass ?PROP Proposition))
    (modalAttribute
        (exists (?S ?X)
            (and
                (realization ?X ?PROP)
                (instance ?S Selling)
                (patient ?S ?X)
                (agent ?S ?AGENT))) Possibility))
Catalog.kif 64-75
(=>
    (and
        (negotiatedPrice ?ENT ?PRICE ?AGREE)
        (partyToAgreement ?SELLER ?AGREE)
        (partyToAgreement ?BUYER ?AGREE)
        (subclass ?ENT Proposition))
    (modalAttribute
        (=>
            (and
                (immediateInstance ?ITEM ?ENT)
                (realization ?PROCESS ?ITEM)
                (instance ?S Selling)
                (patient ?S ?PROCESS)
                (agent ?S ?SELLER)
                (destination ?S ?BUYER))
            (transactionAmount ?S ?PRICE)) Promise))
Catalog.kif 278-293


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