It’s not stopped by the Pilot pulling the Yoke
This design differs from STS according to AMM NG and its problematic.The FCC wont command STS against pilot inputs on the stick but in the case of MCAS it does.So if the crew have recognized the UAS but not the insidious trim due startle factor their pull up inputs are ignored for 9 seconds.They can still trim up electrically but ....
No design is perfect but this looks like a can of worms for Boeing.The MCAS design( the way it overrides a pilots input to a primary flight control surface ie elevator is frankly scary and a departure for Boeing) is too different from STS for type commonality.And no simulators available to demonstrate its design, operation and inherent dangers.My God. If I was flying the MAX,I wouldnt take off/land with the AP STAB trim engaged.MCAS apparently operates at 0.27u/sec which equates to AP trim speed with flaps down.I am still assuming they mandated RUNAWAY STABILIZER NNC as the solution in the AD so as not to rewrite any checklists(UAS).