Originally Posted by
tdracer
I think that part is the key of the statement - "If an engine stays in reverse".
As I noted previously, Boeing reverser design has been changed so that - baring a failure - the reversers won't stay in reverse even after liftoff, they will continue the stow cycle until they are stowed and locked.
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There's the rub. Barring a failure. I've seen enough reversers fail deployed after landing to know it's not uncommon.