rationalskepticism.org

Actually, it's not "grounded in hearsay". We have direct witnesses who were able to swear that they waited outside the small room (which only had one entrance), heard the shot and entered the room to find the bodies of Hitler and Eva. Their statements were witnessed (the Russians wanted to be damned sure that the bastard was dead, and didn't take any one person's word for it, but insisted on corroboration), and fit in with the skeletal remains that are currently sitting in Russian archives. The dental work on the supposed skull of Hitler matches the historical dental records seized from Hitler's dentist's files.

Hearsay would be someone saying, "Well, General so-and-so said he waited in the hallway," or worse yet, "somebody (name unavailable, just 'somebody') told me (fill in the blank)."