Bidoof’s law refers to a popular internet axiom, that states, any person reposting, creating or sharing adult entertainment content (specifically hentai) forfeits the validity of their argument.
The law itself is the embodiment of the biggest mistake in an argument, which is to attack the opposing person themselves and not their reasoning.
A post was uploaded to Tumblr by user bidoof on April 20th, 2017 in which they wrote:
“will there ever be anything more timelessly funnier on this site than seeing some joyless idiot asserting their stupid controversial worldviews internet toughguy style and then checking their blog and they’re just, completely openly and shamelessly addicted to hentai”
The post had amassed a massive amount of notes over the years.
“Bidoof’s law” was often reposted and referred to by users on the internet, especially Twitter and Tumblr, stating that if someone posts and reposts adult entertainment, they forfeit their legitimacy for any argument, no matter how clever and stylish they are in their methods.
This, however resulted in great controversy, as the law itself is argumentum ad hominem, which confuses the validity of the idea with the validity of the person, advocating the idea.
In later years, several parodies were made of the law, reflecting on the idiocy of judging someone by what kind of adult entertainment they are watching.