真偽しんぎ
JLPT: +
truth or falsehood, genuineness, authenticity, veracity

Kanji:
Noun
Example Sentences

彼の報告の真偽のほどは疑わしい。
I doubt the truth of his report.

• • •

この話は又聞きなので、真偽の程は分かりません。
As I heard the story secondhand, I can't ascertain the truth of it.