'Cause I'm a Jack Kirby Zombie.
Jack Kirby could poo on a napkin and I'd buy it for $1,000.
Jack Kirby himself could walk up to me and say, "You know, I didn't create Hell Boy." and I'd say, "Oh, you're just being modest. Of course you did, Jack!"
But seriously, from my decades of obsessive study on this stuff, it's my opinion that Jack's inaccuracies are almost completely the result of his awkward communication skills, confusion, old age, faulty memory, being carried away with indignant emotion, etc.....
Whereas Stan's inaccuracies started all the way back in the late 60's, when they were both still relatively young men, and are almost always the very conscious result of obfuscation, manipulation and outright dishonesty.
That's my assessment. You can get conflicting reports from people that were at Marvel contemporaneously, and people who were close with Jack, and with Stan, so the conflict will never be solved.....but It's my feeling that Stan has always known exactly what he was doing, and Jack was a weird kind of savant who hasn't.
I think Stan IS an evil man, a very gregarious, likeable, charismatic, evil man.
Jack wasn't evil.
*shrug*