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Term 1: Term 2:

(=>
    (and
        (instance ?B Buying)
        (patient ?B ?ITEM)
        (origin ?B ?AGENT)
        (or
            (publishedPrice ?ENT ?PRICE ?AGENT ?PS)
            (unitPrice ?ENT ?QUANT ?AGENT ?PS))
        (subclass ?ENT Physical)
        (immediateInstance ?ITEM ?ENT)
        (validPaymentType ?PS ?PAY))
    (modalAttribute
        (exists (?PAYMENT)
            (and
                (instance ?PAYMENT ?PAY)
                (subProcess ?PAYMENT ?B))) Likely))		 Catalog.kif 322-337
(=>
    (and
        (or
            (publishedPrice ?ENT ?PRICE ?AGENT ?PS)
            (unitPrice ?ENT ?QUANT ?AGENT ?PS))
        (subclass ?ENT Physical)
        (immediateInstance ?ITEM ?ENT)
        (validityPeriod ?PS ?TIMEINT))
    (holdsDuring ?TIMEINT
        (modalAttribute
            (=>
                (and
                    (instance ?S Selling)
                    (agent ?S ?AGENT)
                    (patient ?S ?ITEM))
                (transactionAmount ?S ?PRICE)) Likely)))		 Catalog.kif 357-372
(=>
    (and
        (or
            (publishedPrice ?ENT ?PRICE ?AGENT ?PS)
            (unitPrice ?ENT ?QUANT ?AGENT ?PS))
        (subclass ?ENT Physical)
        (immediateInstance ?ITEM ?ENT)
        (validFor ?PS ?CUSTCLASS)
        (instance ?CUSTOMER ?CUSTCLASS))
    (modalAttribute
        (=>
            (and
                (instance ?B Buying)
                (agent ?B ?CUSTOMER)
                (origin ?B ?AGENT)
                (patient ?B ?ITEM))
            (transactionAmount ?B ?PRICE)) Likely))		 Catalog.kif 339-355


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