Logic form

Article summary

Logic forms are simple, first-order logic knowledge representations of natural language sentences formed by the conjunction of concept predicates related through shared arguments. Each noun, verb, adjective, adverb, pronoun, preposition and conjunction generates a predicate. Logic forms can be decorated with word senses to disambiguate the semantics of the word. There are two types of predicates: events are marked with e, and entities are marked with x. The shared arguments connect the subjects and objects of verbs and prepositions together. Example input/output might look like this: Input: The Earth provides the food we eat every day. Output: Earth:n_#1( x1 ) provide:v_#2( e1 , x1 , x2 ) food:n_#1( x2 ) we( x3 ) eat:v_#1( e2 , x3 , x2 ; x4 ) day:n_#1( x4 ) Logic forms are used in some natural language processing techniques, such as question answering, as well as in inference both for database systems and QA systems.

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Discussion questions

1. Summarise the article in your own words. Which single claim would you verify first, and why?
2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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