From a cursory glance at the article, they appear to use the word bullshit in the same sense as Frankfurt's essay on bullshit.
Frankfurt's essay goes into a lot of detail about what is and isn't bullshit. If I remember correctly, he differentiates between deception / fraud and bullshit, which he characterizes as lack of concern for the truth. A liar has an untruth they want you to believe, a bullshitter wants you to believe something, they just don't care whether it is an untruth or not.
Now of course, one might complain that Frankfurt hijacked a colloquial word for his idea, but he does spend a lot of time trying to understand the everyday use of the word bullshit.
Frankfurt's essay goes into a lot of detail about what is and isn't bullshit. If I remember correctly, he differentiates between deception / fraud and bullshit, which he characterizes as lack of concern for the truth. A liar has an untruth they want you to believe, a bullshitter wants you to believe something, they just don't care whether it is an untruth or not.
Now of course, one might complain that Frankfurt hijacked a colloquial word for his idea, but he does spend a lot of time trying to understand the everyday use of the word bullshit.