In an age of undetectable fakes, how do you know what is true? We can at least prove a source, and with a little work — and help from HTTPS — archive that proof for later reference.
Hint: We have never known for sure what is true. All we could do was ask:
With convincing fakes, we’ve lost the second one. That convincing video or news story? It could be from anywhere. We don’t know who to trust, and we’re left with “What makes sense to me?” — and every one of us has biases about what we wish was true.