for IAlph, OAlph being non empty set
for w1, w2 being FinSequence of IAlph
for tfsm being non empty Mealy-FSM over IAlph,OAlph
for q1t, q2t being State of tfsm st q1t,w1 -leads_to q2t holds
(q1t,(w1 ^ w2)) -response = ((q1t,w1) -response) ^ ((q2t,w2) -response)