Sorry but there is only a preliminary report out from the NTSC on the Lion Air crash, and it does not give a cause.
There is currently no official cause of that crash.
It may only be a preliminary conclusion. But based on available information it is obvious that it is the right one. Might the pilots have been able to save the plane. Maybe. But they should not have been put in that position to begin with. What really matters is that Boeing is firstly responsible. In any real design environment the first thing you would do is to simulate the the failure of a sensor and design to safeguard the system in that event. And now they are indirectly admitting it.