  A series of social media posts signed under the pseudonym "Q", started a
movement known as QAnon, which led some of its most radical supporters to
violent and illegal actions. To identify the person(s) behind Q, we evaluate
the coincidence between the linguistic properties of the texts written by Q and
to those written by a list of suspects provided by journalistic investigation.
To identify the authors of these posts, serious challenges have to be
addressed. The "Q drops" are very short texts, written in a way that constitute
a sort of literary genre in itself, with very peculiar features of style. These
texts might have been written by different authors, whose other writings are
often hard to find. After an online ethnology of the movement, necessary to
collect enough material written by these thirteen potential authors, we use
supervised machine learning to build stylistic profiles for each of them. We
then performed a rolling analysis on Q's writings, to see if any of those
linguistic profiles match the so-called 'QDrops' in part or entirety. We
conclude that two different individuals, Paul F. and Ron W., are the closest
match to Q's linguistic signature, and they could have successively written Q's
texts. These potential authors are not high-ranked personality from the U.S.
administration, but rather social media activists.
