between bullshit and lying

excerpted from On Bullshit, by Harry G. Frankfurt

...she is not concerned with the truth-value of what she says. that is why she cannot be regarded as lying; for she does not presume that she knows the truth, and therefore she cnanot be deliberately promulgating a proposition that she presumes to be false: Her statement is grounded neither in a belief that it is true nor, as a lie must be, in a belief that is not true. It is just this lack of connection to a concern with the truth--this indifference to how things really are--that I regard as the essence of bullshit.