Knowledge corroboration
First Claim
1. A method of obtaining enhanced answers to a plurality of questions comprising:
- accessing features comprising any one or more of;
at least one feature for each of a plurality of judges, and at least one feature for each of the questions;
accessing at least one answer for each question given by one of the judges and, for a plurality of the questions, more than one answer given by different ones of the judges;
using a probabilistic learning system to learn an expertise of each judge using the features, the probabilistic learning system using at least a first question for which an answer is known as ground truth and a second question for which a ground truth answer is unknown, true answers to at least some of the questions being unknown to the probabilistic learning system and true expertise of the judges for the questions being unknown to the probabilistic learning system, an enhanced answer to a question being more likely to be accurate than a corresponding answer before application of the probabilistic learning system; and
using the probabilistic learning system to determine enhanced answers to the questions by aggregating the answers in a manner which takes into account the identified expertise of the judges by weighting answers of the judges based on the identified expertise of the judges.
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Accused Products
Abstract
Knowledge corroboration is described. In an embodiment many judges provide answers to many questions so that at least one answer is provided to each question and at least some of the questions have answers from more than one judge. In an example a probabilistic learning system takes features describing the judges or the questions or both and uses those features to learn an expertise of each judge. For example, the probabilistic learning system has a graphical assessment component which aggregates the answers in a manner which takes into account the learnt expertise in order to determine enhanced answers. In an example the enhanced answers are used for knowledge base clean-up or web-page classification and the learnt expertise is used to select judges for future questions. In an example the probabilistic learning system has a logical component that propagates answers according to logical relations between the questions.
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Citations
19 Claims
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1. A method of obtaining enhanced answers to a plurality of questions comprising:
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accessing features comprising any one or more of;
at least one feature for each of a plurality of judges, and at least one feature for each of the questions;accessing at least one answer for each question given by one of the judges and, for a plurality of the questions, more than one answer given by different ones of the judges; using a probabilistic learning system to learn an expertise of each judge using the features, the probabilistic learning system using at least a first question for which an answer is known as ground truth and a second question for which a ground truth answer is unknown, true answers to at least some of the questions being unknown to the probabilistic learning system and true expertise of the judges for the questions being unknown to the probabilistic learning system, an enhanced answer to a question being more likely to be accurate than a corresponding answer before application of the probabilistic learning system; and using the probabilistic learning system to determine enhanced answers to the questions by aggregating the answers in a manner which takes into account the identified expertise of the judges by weighting answers of the judges based on the identified expertise of the judges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A probabilistic learning system comprising:
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one or more processors; an input operable with the one or more processors and arranged to access features comprising any one or more of;
at least one feature for each of a plurality of judges, and at least one feature for each of the questions;the input also arranged to access at least one answer for each question given by one of the judges and, for a plurality of the questions, more than one answer given by different ones of the judges; using an inference engine arranged to carry out inference using a graphical structure of the probabilistic learning system to learn an expertise of each judge using the features and to determine enhanced answers to the questions by aggregating the answers in a manner which takes into account the identified expertise of the judges, the inference engine being configured use to at least a first question for which an answer is known as ground truth and a second question for which a ground truth answer is unknown to learn the expertise of each judge, true answers to at least some of the questions being unknown to the probabilistic learning system and true expertise of the judges for the questions being unknown to the probabilistic learning system, an enhanced answer to a question being more likely to be accurate than a corresponding answer before application of the probabilistic learning system. - View Dependent Claims (16, 17)
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18. A method of obtaining enhanced answers to a plurality of questions comprising:
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accessing features comprising any one or more of;
at least one feature for each of a plurality of judges, and at least one feature for each of the questions;accessing at least one answer for each question given by one of the judges and, for a plurality of the questions, more than one answer given by different ones of the judges; using a probabilistic learning system to learn an expertise of each judge using the features; and
using the probabilistic learning system to determine enhanced answers to the questions by aggregating the answers in a manner which takes into account the identified expertise of the judges, the probabilistic learning system using at least a first question for which an answer is known as ground truth and a second question for which a ground truth answer is unknown, the at least first question being used to determine a reliablity of the judges, true answers to at least some of the questions being unknown to the probabilistic learning system and true expertise of the judges for the questions being unknown to the probabilistic learning system, an enhanced answer to a question being more likely to be accurate than a corresponding answer before application of the probabilistic learning system;wherein using the probabilistic learning system to determine enhanced answers to the questions comprises using an assessment component of the probabilistic learning system having a graphical structure for aggregating the answers comprising, a node representing a learnt enhanced answer connected to, one node for each observed answer to be aggregated to the learnt enhanced answer, each of the nodes for the observed answers being connected to at least one node representing a learnt expertise indicator of a judge who gave the observed answer. - View Dependent Claims (19)
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Specification