Ask yourself.... How many of the really important people from 20 years ago can you still remember?
20 years ago? You mean.... 1995? Where most, if not all, the world leaders of the time are still alive today? The wife of one whom is campaigning for President of the United States? For the second time? 20 years ago is that much long a time ago. Now, I may not be able to accurately *name* any of them. What, Yeltsin was over Russia? But that's simply because I'm just not strictly good with names, and I was a teenager then and didn't really care about politics or world leaders. But I certainly don't believe any of them were mythical people who may or may not have existed.
You may forget someone's name off-hand, but I doubt anyone today thinks Bill Clinton was a mythical figure that didn't really exist...
Al Gore.... The legends were true!
JFK being 50 years ago and the 1914 pandemic being 100 years ago. All different than 20 years ago.Well people do as have an idealized view of the JFK era as being Camelot and the 1914 flu pandemic was pretty much forgetten about now long afterward.
That's the problem, Han was alive and a teenager (?) when the Jedi were slaughtered, but he was ALIVE when the Jedi were around and going around the galaxy doing Jedi things. There's no reason why he should think the concept of the Jedi or The Force should be a myth, he was alive and capable of forming memories when it was actually happening.
What Han said in TFA doesn't quite match what he said in ANH or ROTJ. In ANH he said he didn't believe in the Force, but he clearly knew about the Jedi knights.