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
hasseigenno hinin funōdewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 発生源の否認不能

1. Not deniable as the source.; It is undeniable as the source.

Negative
Polite
Formal Register
Computing