Journalism in the Classical Age

From “Socrates” by Paul Johnson:

But we always have to bear in mind the low regard classical and, still more, postclassical writers had for truth, their habitual inaccuracy even when trying to be honest, their lack of impartiality, historicity, or plausibility or even, one feels, common sense, and the slovenly way books were written, copied, and preserved.

I dunno. Something about that sentence intrigues me.