A method and systems for intelligent selection and classification of oracles used to train a predictive cognitive system. A computerized oracle-selection system identifies candidate “oracle” experts in a field of endeavor known as a domain. The system retrieves contemporaneous natural-language “artifact” documents that each refer to or were produced by an oracle, and contains information from which may be predicted a future event related to the domain. The system assigns each oracle a confidence factor that identifies the accuracy of that oracle's predictions, and ranks the artifacts by how closely each matches the domain and by the confidence factors of its associated oracles. The artifacts are merged into the corpus, where the rankings indicate which artifacts may most reliably be used by the cognitive system to formulate predictive responses to user queries. This procedure is repeated each time the system receives user feedback or an updated set of artifacts.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An oracle-selection system comprising a processor, a memory coupled to the processor, and a computer-readable hardware storage device coupled to the processor, the storage device containing program code configured to be run by the processor via the memory to implement a method for intelligent selection and classification of oracles, the method comprising: the selection system identifying a set of candidate oracles, where each oracle of the set of candidate oracles is an expert in a field of endeavor identified by a domain of a corpus of a cognitive system; the selection system retrieving a set of artifacts from remote sources, where each artifact of the set of artifacts comprises unstructured data associated with an oracle of the set of oracles, and where the retrieving is performed by a set of concurrent procedures that retrieve artifacts at a substantially similar time; the selection system associating a subset of the retrieved artifacts with the domain, where the domain identifies a topic of each artifact of the subset; the selection system assigning a confidence factor of a set of confidence factors to each oracle of the set of oracles, where a higher confidence factor assigned to a first oracle identifies a greater presumed degree of reliability of one or more predictions made by the first oracle within the field of endeavor; the selection system ranking the subset of artifacts, where a higher-ranking artifact of the subset is deemed to have more significance to the cognitive system than does a lower-ranking artifact of the subset; and the selection system merging the artifacts into the corpus. 2. The selection system of claim 1, where the cognitive system and the corpus are characterized by a system precision that identifies a degree of granularity of predictions made by the cognitive system in response to user input, and where the ranking further comprises: the selection system assigning an artifact precision of a set of artifact precisions to each artifact of the subset; and the selection system assigning a higher rank to an artifact associated with an artifact precision that is more similar to the system precision. 3. The selection system of claim 1, where the ranking further comprises: the selection system assigning a higher rank to an artifact associated with an oracle assigned a higher confidence factor. 4. The selection system of claim 1, further comprising: the selection system, in response to receiving a feedback about an accuracy of a prediction of a future event related to the domain made by the cognitive system as a function of the corpus, updating the corpus, where the updating comprises: the selection system further retrieving an updated set of artifacts; the selection system further associating an updated subset of the updated set of artifacts with the domain, where the domain identifies a topic of each artifact of the updated subset; the selection system revising the set of confidence factors as a function of the updated set of artifacts; the selection system further ranking the updated subset of artifacts; and the selection system merging the updated subset of artifacts into the corpus such that the cognitive system's next prediction will be made as a function of the updated corpus. 5. The selection system of claim 1, where the retrieved artifacts each comprise one or more natural-language publications that either refer to or are produced by an oracle of the set of candidate oracles. 6. The selection system of claim 1, where the merging comprises: the selection system indexing each artifact of the set of artifacts such that each index of the each artifact identifies a characteristic of the each indexed artifact; the selection system creating entries in the corpus that each comprise information extracted from an artifact of the indexed artifacts; and the selection system incorporating the indexes of the indexed artifacts into a data structure of the corpus such that created entries may be identified and retrieved by a corpus-access function of the cognitive system. 7. The selection system of claim 1, where the corpus comprises two or more sub-corpora, where each sub-corpus is associated with one or more sub-domains that are each distinct from the domain of the corpus, and where each oracle of the set of candidate oracles and each artifact merged into the corpus is associated with the domain and with one or more of the sub-domains. 8. A method for intelligent selection and classification of oracles, the method comprising: a computerized oracle-selection system identifying a set of candidate oracles, where each oracle of the set of candidate oracles is an expert in a field of endeavor identified by a domain of a corpus of a cognitive system; the selection system retrieving a set of artifacts from remote sources, where each artifact of the set of artifacts comprises unstructured data associated with an oracle of the set of oracles, and where the retrieving is performed by a set of concurrent procedures that retrieve artifacts at a substantially similar time; the selection system associating a subset of the retrieved artifacts with the domain, where the domain identifies a topic of each artifact of the subset; the selection system assigning a confidence factor of a set of confidence factors to each oracle of the set of oracles, where a higher confidence factor assigned to a first oracle identifies a greater presumed degree of reliability of one or more predictions made by the first oracle within the field of endeavor; the selection system ranking the subset of artifacts, where a higher-ranking artifact of the subset is deemed to have more significance to the cognitive system than does a lower-ranking artifact of the subset; and the selection system merging the artifacts into the corpus. 9. The method of claim 8, where the cognitive system and the corpus are characterized by a system precision that identifies a degree of granularity of predictions made by the cognitive system in response to user input, and where the ranking further comprises: the selection system assigning an artifact precision of a set of artifact precisions to each artifact of the subset; and the selection system assigning a higher rank to an artifact associated with an artifact precision that is more similar to the system precision. 10. The method of claim 8, where the ranking further comprises: the selection system assigning a higher rank to an artifact associated with an oracle assigned a higher confidence factor. 11. The method of claim 8, further comprising: the selection system, in response to receiving a feedback about an accuracy of a prediction of a future event related to the domain made by the cognitive system as a function of the corpus, updating the corpus, where the updating comprises: the selection system further retrieving an updated set of artifacts; the selection system further associating an updated subset of the updated set of artifacts with the domain, where the domain identifies a topic of each artifact of the updated subset; the selection system revising the set of confidence factors as a function of the updated set of artifacts; the selection system further ranking the updated subset of artifacts; and the selection system merging the updated subset of artifacts into the corpus such that the cognitive system's next prediction will be made as a function of the updated corpus. 12. The method of claim 8, where the retrieved artifacts each comprise one or more natural-language publications that either refer to or are produced by an oracle of the set of candidate oracles. 13. The method of claim 8, where the merging comprises: the selection system indexing each artifact of the set of artifacts such that each index of the each artifact identifies a characteristic of the each indexed artifact; the selection system creating entries in the corpus that each comprise information extracted from an artifact of the indexed artifacts; and the selection system incorporating the indexes of the indexed artifacts into a data structure of the corpus such that created entries may be identified and retrieved by a corpus-access function of the cognitive system. 14. The method of claim 8, further comprising providing at least one support service for at least one of creating, integrating, hosting, maintaining, and deploying computer-readable program code in the computer system, wherein the computer-readable program code in combination with the computer system is configured to implement the identifying, retrieving, associating, assigning, ranking, and merging. 15. A computer program product, comprising a computer-readable hardware storage device having a computer-readable program code stored therein, the program code configured to be executed by an oracle-selection system comprising a processor, a memory coupled to the processor, and a computer-readable hardware storage device coupled to the processor, the storage device containing program code configured to be run by the processor via the memory to implement a method for intelligent selection and classification of oracles, the method comprising: the selection system identifying a set of candidate oracles, where each oracle of the set of candidate oracles is an expert in a field of endeavor identified by a domain of a corpus of a cognitive system; the selection system retrieving a set of artifacts from remote sources, where each artifact of the set of artifacts comprises unstructured data associated with an oracle of the set of oracles, and where the retrieving is performed by a set of concurrent procedures that retrieve artifacts at a substantially similar time; the selection system associating a subset of the retrieved artifacts with the domain, where the domain identifies a topic of each artifact of the subset; the selection system assigning a confidence factor of a set of confidence factors to each oracle of the set of oracles, where a higher confidence factor assigned to a first oracle identifies a greater presumed degree of reliability of one or more predictions made by the first oracle within the field of endeavor; the selection system ranking the subset of artifacts, where a higher-ranking artifact of the subset is deemed to have more significance to the cognitive system than does a lower-ranking artifact of the subset; and the selection system merging the artifacts into the corpus. 16. The computer program product of claim 15, where the cognitive system and the corpus are characterized by a system precision that identifies a degree of granularity of predictions made by the cognitive system in response to user input, and where the ranking further comprises: the selection system assigning an artifact precision of a set of artifact precisions to each artifact of the subset; and the selection system assigning a higher rank to an artifact associated with an artifact precision that is more similar to the system precision. 17. The computer program product of claim 15, where the ranking further comprises: the selection system assigning a higher rank to an artifact associated with an oracle assigned a higher confidence factor. 18. The computer program product of claim 15, further comprising: the selection system, in response to receiving a feedback about an accuracy of a prediction of a future event related to the domain made by the cognitive system as a function of the corpus, updating the corpus, where the updating comprises: the selection system further retrieving an updated set of artifacts; the selection system further associating an updated subset of the updated set of artifacts with the domain, where the domain identifies a topic of each artifact of the updated subset; the selection system revising the set of confidence factors as a function of the updated set of artifacts; the selection system further ranking the updated subset of artifacts; and the selection system merging the updated subset of artifacts into the corpus such that the cognitive system's next prediction will be made as a function of the updated corpus. 19. The computer program product of claim 15, where the retrieved artifacts each comprise one or more natural-language publications that either refer to or are produced by an oracle of the set of candidate oracles. 20. The computer program product of claim 15, where the merging comprises: the selection system indexing each artifact of the set of artifacts such that each index of the each artifact identifies a characteristic of the each indexed artifact; the selection system creating entries in the corpus that each comprise information extracted from an artifact of the indexed artifacts; and the selection system incorporating the indexes of the indexed artifacts into a data structure of the corpus such that created entries may be identified and retrieved by a corpus-access function of the cognitive system.