who is allowed to see which objects in addition analysts 39 ability to make useful judgments about objects can be tested by randomly adding known objects and comparing the analysts 39 description to accepted descriptions of that object this information can be used for training purposes or to detect malicious or random input in some embodiments the system supports two basic modes of analyzing the objects from a data stream descriptive and hypothesis testing in the descriptive mode an analyzer creates textual or structured descriptions of the objects and an aggregator integrates these descriptions to index the content of the analyzed data stream in the hypothesis testing mode the synthesizers are responsible for formulating hypotheses about the data stream and using the system to test these hypotheses while the analyzers are responsible for generating descriptions and categorizations of objects information requests generated by the synthesizers may also include references that can be but are not limited to images sounds video sensor data or other data that describe to the analyzers the subjects of interest for a non limiting example a useful information request might include a picture of a person from some source with a prompt asking if this person is found in a given object the synthesizer posing the request can specify the range of objects against which a request will be applied and what domain expertise the analyst requires if any to answer it these requests can be distributed to analyzers using the same method as in the.