Hypotheses and Definitions in Language Evolution Research Reply to Mendívil-Giró (2020) Authors Stefan Hartmann University of Düsseldorf Michael Pleyer Center for Language Evolution Studies, Nicolaus Copernicus University, Torun, Poland Slawomir Wacewicz Center for Language Evolution Studies, Nicolaus Copernicus University, Torun, Poland Antonio Benítez-Burraco Faculty of Philology, University of Seville, Spain Przemyslaw Zywiczynski Center for Language Evolution Studies, Nicolaus Copernicus University, Torun, Poland