They are unable to recognize both familiar and unfamiliar faces. This explains why people are good at identifying familiar objects rather than unfamiliar. People express weaker gender stereotypes with unfamiliar than familiar names. They are also able to distinguish between familiar and unfamiliar conspecifics. Like humans, chimpanzees can distinguish the faces of familiar and unfamiliar individuals. Furthermore, they are able to categorize images as familiar and unfamiliar individuals. It found that participants were more accurate at matching familiar faces than unfamiliar ones. By disrupting interactions with both familiar and unfamiliar people, it jeopardizes the patient's social relations. The interview seemed believable to many viewers, particularly those unfamiliar with Kewney. This commonly occurs in new situations or with unfamiliar people. Dialects are in some cases so dissimilar as to be unintelligible to unfamiliar listeners. Epenthesis most often occurs within unfamiliar or complex consonant clusters. It is a highly protective territorial dog that is wary of unfamiliar people. Names for old or unfamiliar local occupations may cause confusion if poorly legible. Tamarins are able to identify the sex of unfamiliar callers too.