poetics, manifesto, or self justification?

if self justification addresses a gap between behaviour and belief, and poetry, the gap between already-expressed-in-language experience and personal experience (writ large), then it is not the poetics statement, but the poetry itself which is self justification

the poetics statement justifies the poetry: it is saying that there is no difference between behaviour (writings) and the author's intentions

the manifesto is stating those intentions or beliefs

however, writing/composing/dictating/ranting out the poetics statement or manifesto is also behaviour, so

and what about the reverse engineered statement?