Contradictorian 

One who aced Paolo Mancosu's UC Berkeley logic classes, including the most advanced: Philosophy of Logic and Mathematics - Theories of Truth. These are widely known as the most intellectually challenging courses at Cal.

That dude is such a contradictorian. He started from the bottom now he's here.

Contradictorian by infinityink March 16, 2018

Contradictorian 

Someone who always finds a way to push back against suggestions.

"I suggested pizza for dinner, and of course, Jake—being the resident contradictorian—insisted he suddenly hates pizza."
"No matter what I propose, Sarah always has to take the opposite stance. She's such a contradictorian."
"Trying to plan a group trip with a contradictorian is impossible—they’ll shoot down every idea just to make things difficult."
"Dave isn’t just opinionated; he’s a full-on contradictorian. If I say the sky is blue, he’ll argue it’s ‘more of a cerulean-gray’ just to be difficult."
"I swear, my boss is a professional contradictorian. If I say we should speed up the process, he’ll tell me to slow down. If I suggest slowing down, suddenly efficiency is key."

Contradictorian by @spooky_zn6 February 19, 2025

Contradictoring 

The act of contradicting someone even though you know you are wrong.

They were contradictoring me, even though they new i was right about the dog being disobedient.

Contradictoring by anonymous February 13, 2021

contradicktarian 

Someone who insists on contradicting others, in a dickish way, regardless of whether they are right or wrong.

"He regretted saying anything right away, as he knew he was talking to a total contradicktarian"

contradicktarian by Madasmyth April 24, 2020