1. A computer-implemented method, comprising: creating, by a processing device, a network to evaluate a plurality of rules in a knowledge base, the network comprising a plurality of nodes; processing, by the processing device, data in a plurality of sessions simultaneously using the network; and logically unlinking, by the processing device, a first node in the network from a second node in the network for a first one of the plurality of sessions while keeping the first node linked to the second node for a second one of the plurality of sessions.