Assertion: detection | /r/HasProperty | difficult
Facets:
value: very
type: DEGREE
Source sentences:
text: I think we need to listen to experts such as Paul Ekman, Bella DePaulo, Mark Frank, Maureen O'Sullivan, Aldert Vrij, and Judee Burgoon, who have repeatedly stated, there is no single behavior indicative of deception and that the detection of lies is very difficult (Navarro 2008, 205-208).
text: Though this approach is attractive, part detection itself is a difficult task.