1. An associative memory system comprising: a network of networks of associative memory networks, comprising: a network of entity associative memory networks, a respective entity associative memory network comprising associations among a respective observer entity and a plurality of observed entities that are observed by the respective observer entity, based on a plurality of input documents; and a network of feedback associative memory networks, a respective feedback associative memory network comprising associations among a plurality of observed entities for a respective observer positive and/or negative evaluation for a respective task of a respective user; and a processing system that is configured to observe associations into, and imagine associations from, the network of networks of associative memory networks.