Jose writes:

Another example is fighting the autopilot... if you push the nose down,
the autopilot will compensate by trimming up to maintain altitude. It
will do this until it can no longer compensate, then it disengages,
which is a surprise to the unaware pilot.

I think that's the kind of thing he may be referring to.

Yes. As a general rule, automation systems greatly reduce situational
awareness. That is necessary for them to accomplish their purpose,
but it is also dangerous. Problems arise when human beings forget
that automation does this (unfortunately they forget this very
easily).

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