  Hadron cascade model is an essential part of Monte Carlo neutrino event
generators that governs final state interactions of knocked-out nucleons and
produced pions. It is shown that such model enriched with physically motivated
modifications of nucleon-nucleon cross section and incorporation of nuclear
correlation effects is able to reproduce experimental nuclear transparency
data. Uncertainty of nucleon final state interactions effects is estimated and
applied to recent neutrino-nucleus cross section measurements that include an
outgoing proton in the experimental signal. Conclusions are drawn on a
perspective of identification of events that originate from two-body current
mechanism.
