8. A computer program product comprising a computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a computing device, causes the computing device to implement a cognitive system for capturing referential information, wherein the computer readable program causes the computing device to: receive, by a message aggregator executing within the cognitive system, a first indication that a group text messaging conversation is in a muted state for a first user, detect, by a cognitive agent executing within the cognitive system, a first use of a referential phrase in the group text messaging conversation during a first time period when the group text messaging conversation is in the muted state wherein detecting the first use of the referential phrase comprises: parsing, by a parser executing within the cognitive agent, one or more conversation message within the group text messaging conversation to perform parsing and semantic analysis to annotate the one or more conversation messages; extracting, by a feature extraction component executing within the cognitive agent, a set of features from the one or more conversation message describing the one or more conversation message; and processing by a natural language classifier component executing within the cognitive agent, the set of features to identify that the one or more conversation messages contain the first use of the referential phrase using a machine learning model that determines a category for each term or phrase based on the set of features and calculates a confidence for each category; receive, by the message aggregator, a second indication that the group text messaging conversation is in a non-muted state for the first user; detect, by the cognitive agent, a second use of the referential phrase in the group text messaging conversation during a second time period when the group text messaging conversation is in the non-muted state, wherein the second time period is subsequent to the first time period; alter, by the cognitive agent, a message containing the second use of the referential phrase within the group text messaging conversation within a multi-user chat display; determine, by the cognitive system, a first probability that the first user understands the referential phrase; and provide, by the cognitive system, first information to the first user within the multi-user chat display when the first probability is below a threshold, wherein the first information pertains to the referential phrase.
8. A computer program product comprising a computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a computing device, causes the computing device to implement a cognitive system for capturing referential information, wherein the computer readable program causes the computing device to: receive, by a message aggregator executing within the cognitive system, a first indication that a group text messaging conversation is in a muted state for a first user, detect, by a cognitive agent executing within the cognitive system, a first use of a referential phrase in the group text messaging conversation during a first time period when the group text messaging conversation is in the muted state wherein detecting the first use of the referential phrase comprises: parsing, by a parser executing within the cognitive agent, one or more conversation message within the group text messaging conversation to perform parsing and semantic analysis to annotate the one or more conversation messages; extracting, by a feature extraction component executing within the cognitive agent, a set of features from the one or more conversation message describing the one or more conversation message; and processing by a natural language classifier component executing within the cognitive agent, the set of features to identify that the one or more conversation messages contain the first use of the referential phrase using a machine learning model that determines a category for each term or phrase based on the set of features and calculates a confidence for each category; receive, by the message aggregator, a second indication that the group text messaging conversation is in a non-muted state for the first user; detect, by the cognitive agent, a second use of the referential phrase in the group text messaging conversation during a second time period when the group text messaging conversation is in the non-muted state, wherein the second time period is subsequent to the first time period; alter, by the cognitive agent, a message containing the second use of the referential phrase within the group text messaging conversation within a multi-user chat display; determine, by the cognitive system, a first probability that the first user understands the referential phrase; and provide, by the cognitive system, first information to the first user within the multi-user chat display when the first probability is below a threshold, wherein the first information pertains to the referential phrase. 11. The computer program product of claim 8 , wherein the providing first information to the first user further comprises replacing the referential phrase with the first information.