IANAL, but as far as I understand the situation it is not. See https://en.wikipedia.org/wiki/Chinese_wall#Reverse_engineering https://en.wikipedia.org/wiki/Chi

IANAL, but as far as I understand the situation it is not. See https://en.wikipedia.org/wiki/Chinese_wall#Reverse_engineering https://en.wikipedia.org/wiki/Chinese_wall#Reverse_engineeri... But IIUC, clean room reverse engineering requires substantial effort to prove you did not take any shortcuts.