We have received three answers to that question so far; each has been deleted. The two most recent ones were the same.
Questions on non-literary texts are on topic if they ask as "literary" question about the text. The question about Michel Salomon's book doesn't ask for a literary approach to it.
Basically, some people have figured out that Attali did not say those words, so the conspiracy theorist take it one step further and claim they were included in an edition that has been disappeared. Let's not feed the trolls please.
I agree with bobble: the question seems on topic and appears to be angling for a debunking of the conspiracy theory rather than "just asking questions" (i.e. pushing an egenda)