What if the person you are "well, actually"ing is the one who's insecure about their intelligence and constantly spouting and trying to defend inaccurate statements with obvious origins?
"Hey guys did you hear? It's official: Pluto is not a planet! Fuck you, Pluto!"
"Yeah, totally! Lucky for Pluto though, the vote was rigged, so nobody's going to actually recognize it and everyone who matters will forget it happened."
"Your blood type is O? Say, you don't eat much meat! That must be why you have so many problems with digestion! I'm going to add meat to your shopping list."
"Well, actually, the blood type diet is not based on any scientific studies which have ever been published despite the author's claims that he has loads of evidence, and also my digestion is definitely correlated with stress and is actually better when I eat less meat. I appreciate the thought, though."
"Ah, you gave me a Quartz? It has healing properties! And can make rain fall! That's not too good since we have been having way too much rain lately."
"Um...maybe... I was thinking it's supposed to amplify clarity of thought, since I remember you mentioning you feel like you have brain fog sometimes so I thought this might help when that happens. It's shaped like the first letter of your name, too!"
Like, sorry guys, but..