This is possible because language is not the only symbolic means of communication. In order to prove that chimpanzees and gorillas are capable of language, and not simply a different kind of symbolic communication system, they must learn a sign language with the basic characteristics of human language.
Definition of Halloween. : October 31 observed especially with dressing up in disguise, trick-or-treating, and displaying jack-o'-lanterns during the evening.
Other western countries embraced the holiday in the late twentieth century including Ireland, the United States, Canada, Puerto Rico and the United Kingdom as well as of Australia and New Zealand. Halloween has its origins in the ancient Celtic festival known as Samhain (pronounced âsah-winâ).