Wicca been influenced by other Pagan religions, thus making clear-cut distinctions between them more difficult for religious studies scholars to make. The terms "wizard" and "warlock" are generally discouraged in the community. In Wicca, denominations are referred to as "traditions", while non-Wiccans are often termed "cowans". When the religion first came to public attention, it was commonly called "Witchcraft". For instance, Gerald Gardner—the man regarded as the "Father of Wicca"—referred to it as the "Craft of the Wise", "witchcraft", and "the witch-cult" during the 1950s. There is no evidence that he ever called it "Wicca", although he did refer to the
Wicca oral teachings passed along to their initiates. There are many variations on the core structure, and the religion grows and evolves over time. It is divided into a number of diverse lineages, sects and denominations, referred to as "traditions", each with its own organisational structure and level of centralisation. Due to its decentralized nature, there is some disagreement over what actually constitutes Wicca. Some traditions, collectively referred to as British Traditional Wicca, strictly follow the initiatory lineage of Gardner and consider the term "Wicca" to apply only to similar traditions, but not to newer, eclectic traditions. Wicca is typically duotheistic,