The quality or state of being exemplary; the characteristic of serving as a worthy example or model for others.
From 'exemplary' plus the noun-forming suffix '-ness.' This abstract noun allows discussion of the abstract quality that makes something worth imitating.
The 'exemplariness' of a historical figure often gets rewritten—we elevate certain people as perfect models, then later discover they were complicated or flawed, which says more about us than about them.
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