Abstract and Keywords
This article explores the relation between grammaticalisation and directionality. It evaluates the unidirectionality hypothesis which states that the changes which fall under the rubric of grammaticalisation always move in the direction from more to less lexical or from less to more grammatical. It highlights the usefulness of the apparent unidirectionality of grammaticalisation as a valuable tool for reconstruction in a domain, morphosyntax, where reconstruction has been frequently argued to be difficult if not impossible.
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