The quality or state of being bimodal; the condition of having two distinct modes or peaks in a distribution.
From bimodal + -ity (noun-forming suffix). Emerges from statistical terminology in the 20th century to describe datasets with two prominent peaks.
Bimodality is how scientists describe a 'tale of two cities' in data—when patterns split into exactly two groups, it often reveals hidden structure like different populations mixed together.
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