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 up for debate , 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.