There is a syndrome which many of us may not have heard of. It is called the shifting baseline syndrome. This syndrome is mostly used to refer to reference points used to measure aspects of ecosystems, for example quality and quantify of fish in a lake.
It was found that as successive generations of scientists studied a particular ecosystem, they often took the baseline as what they were able to measure at the beginning of their contact with that ecosystem. Changes over time were measured against that reference point.
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