If you think it's a fact, you don't know what facts are.  It's an opinion, pure and simple, and it has no place in an encyclopaedia.  You did not explain what you feel is added by saying "X is best known for being Y" instead of "X is Y".  Like I say, I had never heard of him, so to me he wasn't best known for anything.  Right now he's best known to me for his role in uncovering the bone headed stupidity of people who can't distinguish fact from opinion and yet still think they have something to contribute to an encyclopaedia.

And no, stating one thing that someone did does not and cannot suggest that they never did anything else.  Do you understand what a lead section is? 190.162.52.196