SILVIA Brain Files store an array of strings called Concepts, which in turn have Binding Types that relate them to each other. There can be many thousands of Concepts stored in a SILVIA Brain File. Bound Concepts enable the SILVIA Core to weight the relevancy of inputs, choose output Behaviors and Exuders, and perform other actions like generating Dynamic Outputs. The more Bindings there are on Concepts, the better SILVIA can relate inputs to outputs, or use similar vocabulary to vary output.