I has question.
So I've been watching the Marineford Arc again (well, watching clips of it on youtube), and there's something puzzling that I somehow never noticed before.
So I thought all this time that attacks infused with Haki were supposed to nullify logia based devil fruits. But there were two instances that put that into question. The first was Marco and Vista attacking Akainu with haki infused attacks, which Akainu completely shrugged off. Whatever damage he had was superficial, and he fully healed instantly.
Now, one possibility that could explain this is that simply having haki isn't enough to harm a logia user. You need haki, but more importantly, you need an incredibly strong level of haki. This would explain why both Marco and Vista couldn't harm someone at Admiral level, but someone like White Beard could. The difference between White Beard and his subordinates (even including his first mate!) was just that huge.
But case number two seems to contradict that theory. When Whitebeard was fighting Aokiji, he stabbed him with his haki infused bisento, but Aokiji was totally fine, and continued his onslaught like as if he was fighting Luffy. This is even further weirder because someone like Jozu tackled Aokiji and actually was able to hurt him (even if it was minor).
What's up with that?