Can you tell if tongue movements are real or synthesized?

Olov Engwall, Preben Wik. Can you tell if tongue movements are real or synthesized?. In Barry-John Theobald, Richard Harvey, editors, Auditory-Visual Speech Processing, AVSP 2009, Norwich, UK, September 10-13, 2009. pages 96-101, ISCA, 2009. [doi]

@inproceedings{EngwallW09-0,
  title = {Can you tell if tongue movements are real or synthesized?},
  author = {Olov Engwall and Preben Wik},
  year = {2009},
  url = {http://www.isca-speech.org/archive_open/avsp09/av09_096.html},
  researchr = {https://researchr.org/publication/EngwallW09-0},
  cites = {0},
  citedby = {0},
  pages = {96-101},
  booktitle = {Auditory-Visual Speech Processing, AVSP 2009, Norwich, UK, September 10-13, 2009},
  editor = {Barry-John Theobald and Richard Harvey},
  publisher = {ISCA},
}