Although fuzzy logic was developed by Lotfi Zadeh in the USA, it never gained the level of interest and respectability here that it did in Japan and Eastern Europe. I remember American engineers saying that fuzzy techniques were things they already understood and were doing under different names. They saw no benefit in adopting a new conceptual system.

Among the more philosophically inclined, there was controversy other whether fuzzy logic was really something new or just a repackaging of old ideas with a misleading vocabulary. There was a book on how this debate played out in journal articles, but I can't think of the title now.