発生 はっせい げん否認 ひにん不能 ふのうじゃなかったです
hasseigenno hininfunōjanakattadesu

Noun
Desu Copula

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

1. Could not deny the source.; Wasn't able to deny the origin.

Past/Perfective
Negative
Polite
Casual Register
Computing