With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Fritigern is not mentioned again in any source after 381, and his fate is uncertain, he may have been killed in the Greek campaign, or he may have been deposed as a condition for peace.
text_B: If a source from 383 mentioned that Fritigern was alive, would this drastically change what historians know about him?
YES.