He is saying that that is a fact, but not merely because it is “a statement sufficiently well-formed to be either true or false”. For example, he would say that “If Oswald hadn’t shot Kennedy, somebody else would’ve” is not a fact, even though it is equally well formed. The point of the article is to explain how some counterfactuals can be facts while others are not.
Has the post been edited since you made this comment? I couldn’t find any examples of this.
He is saying that that is a fact, but not merely because it is “a statement sufficiently well-formed to be either true or false”. For example, he would say that “If Oswald hadn’t shot Kennedy, somebody else would’ve” is not a fact, even though it is equally well formed. The point of the article is to explain how some counterfactuals can be facts while others are not.