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demonstratable

adjective
dem·​on·​strat·​able | \ ¦demən¦strātəbəl\

Definition of demonstratable

: demonstrable easily demonstratable aural and visual proof— R. D. Darrell

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First Known Use of demonstratable

15th century, in the meaning defined above

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The first known use of demonstratable was in the 15th century

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