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概念 がいねん実証 じっしょうじゃありませんでした
gainenjisshōjārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 概念実証

1. Was not a proof of concept.; Was not a feasibility study.

Past/Perfective
, 
Negative
, 
Polite
, 
Terminal Form

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概念実証じゃありませんでした

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