It's not that the past is not true. The past is true, what was reported is not. We know very clearly where the problem lies. The media is a lie. Headlines like "she'll never walk again" sells more than "she'll be fine".
But I agree with the point that it's not "the past" that's at fault here, it's unreliable sources of information.
How do you know the past even exists? All you have is memory and reports, which are unreliable. You can only make the assumption that "the past is true."
> We know very clearly where the problem lies. The media is a lie.
You're understating that. It's not just "the media" boogeyman, it's memory and records that are the problem. They're never complete and always get stuff wrong.