cicerone imposter wrote: You'll never be able to prove them with "observable evidence" that can be verified by others. I'm not a cynic for not trusting something you can't prove.
Can you prove that George Washington lived with "observable evidence" that can be verified by others today?
No.
Historical evidence, that is evidence relating to experiences of people in the past (whether 5 minutes past or 500 years), is not observable by others. It happened and now it's gone.
You don't use scientific evidence only to conclusively prove such matters. Empirical (observable) evidence may or may not be brought which tends to support or negate the question, but empirical evidence is generally not able to conclusively prove the past.
You had to have been there (or had a video camera rolling and even that can be faked ); or you have to rely on the testimony of people who were there.
What does a jury rely on to "prove" something happened , or didn't, in the past?