Mark Aronoff is Distinguished Professor of Linguistics at the State University of New York at Stony Brook, USA. His research touches on almost all aspects of morphology and its relation to other aspects of language. He is a member of a team studying a newly-created sign language, Al-Sayyid Bedouin Sign Language, and he has served as Editor of Language, the Journal of the Linguistic Society of America, and as President of the Society. He is a Fellow of the American Academy of Arts and Sciences. Janie Rees-Miller is professor emerita of Modern Languages at Marietta College, USA. Before retirement, she held the William R. and Marie Adamson Flesher Chair in the Humanities. She established the ESL Program at Marietta College, USA and served as its director for over 20 years. She also taught linguistics courses for undergraduates and acted as an editor with Mark Aronoff of Contemporary Linguistics (2017), now in its seventh edition. Her research interests include second language pedagogy, pragmatics, Native American languages, and making linguistics accessible to non-linguists.