Mode is defined by mls, not gls.

For example, if you defined the mode of the rear-view mirror in terms of gls, you would say that it should be ‘dim’ during the day, and ‘wide open’ at night, but the reality is just the opposite, because it is mls (those headlights from the vehicle behind you blinding your rear vision) that controls: it should be ‘dim’ at night, and ‘wide open’ during the day.
keywords: life, General Systems Theory, Kurt Lewin