発生 はっせい げん否認 ひにん不能 ふのうではありませんでした
hasseigenno hinin funōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 発生源の否認不能

1. Could not deny the origin.; Was not able to deny the source.

Past/Perfective
Negative
Polite
Formal Register
Computing