My understanding is that there is no 'best option'. Dual input is a situation that shouldn't ever happen while a crew is flying according to protocol. In AF447

My understanding is that there is no 'best option'. Dual input is a situation that shouldn't ever happen while a crew is flying according to protocol. In AF447 it has been established that the crew failed to follow multiple protocols, ignored warnings (including the audible "dual input") and while design / instrument improvements have been put forward, it's not clear they would have avoided that tragedy. The conflicting inputs only happened during the final seconds of descent. Here's a good discussion on the why: https://aviation.stackexchange.com/questions/23577/why-do-airbus-sidesticks-add-their-inputs https://aviation.stackexchange.com/questions/23577/why-do-ai... The latest Boeing 787 has switched to fly-by-wire. EDIT: an eerily straight-forward report of how the AF447 flight came down: https://www.popularmechanics.com/flight/a3115/what-really-happened-aboard-air-france-447-6611877/ https://www.popularmechanics.com/flight/a3115/what-really-ha...