You might be able to read Olson, Dorn & some of the other like poets, using Fry binoculars (tweaked). That is, the "documentary" in history is also a kind of indication (ostensive).
Simple pointing toward facts (it is what it is) is also tautological, though for the purposes of interpretation & ideology, such indication becomes the primary tool in argument, persuasion (& thus loses its force or gets blurred in verbiage & comparisons).
But perhaps in a "documentary" poem, the facts can get taken in a different direction - aligned or fused with Fry's notion of the submerged prima materia of literature and lyric poetry : the tautological is-what-it-is of "precognitive", "somatic", pre- or non-human "being". A form of irrational or anti-thematic rhyme.