1. A system comprising: a processor; a data bus coupled to the processor; and a computer-usable medium embodying computer program code, the computer-usable medium being coupled to the data bus, the computer program code used for refining cognitive insights using cognitive graph vectors and comprising instructions executable by the processor and configured for: storing data from a plurality of data sources within a cognitive graph, the cognitive graph representing a data domain; associating a first set of the data of the data domain within the cognitive graph with a first cognitive graph vector of a plurality of cognitive graph vectors, the first cognitive graph vector extending away from a cognitive graph nexus in a first direction; associating a second set of the data within the cognitive graph with a second cognitive graph vector of the plurality of cognitive graph vectors, the second cognitive graph vector extending away from the cognitive graph nexus in a second direction; processing the data from the plurality of data sources to provide cognitive insights; and refining the cognitive insights based upon a limitation relating to one of the plurality of cognitive graph vectors, the limitation corresponding to a selected cognitive graph vector parameter.