A context-sensitive stochastic Boolean network (CSSBN) without perturbation (at time t ). The multiplexer (MUX) with control sequences S
1 ~ S
probabilistically determine the selection of a network function for context i, while the multiplexer with control sequence Q determines whether a switch of contexts occurs. The selection probabilities of the new context are computed by the 2-to-1 multiplexer (MUX) with the original and current context selection sequences as inputs and Q as the control sequence.