Here, machine literacy means being able to question and use machine-generated language while retaining responsibility for your own reasoning. Fluency in an answer is not evidence that its conclusion follows.
Illustrative example
A reader asks an assistant to summarise a policy. The summary says an appeal is always permitted. The reader checks the original, finds the eligibility condition and rewrites the conclusion before relying on it.
Literacy Is the difference between being able to formulate your own reasoning and simply selecting from pre-packaged options, between understanding a text and merely consuming it.