Hactual - A word that people use when they think they're smarter than

A word that people use when they think they're smarter than you, even if they're not. It’s like a fancy way of saying, 'You're wrong.'

"Hactual! I had to look it up!", Lisa, after I said 2+2 was 4

"Hactual! You didn’t even try!", Mark, after I said the moon was made of cheese

"Hactual! I knew that before you did!", Jeff, after I said the sun was hot