Several researchers have argued that not all of Gardner's intelligences fall within the cognitive sphere. Howard Gardner identified a wide range of modalities in his Multiple Intelligences theories. He said that he had channeled the material via his psychic connections with extraterrestrial intelligences. Magick also proposes that various spirits and non-corporeal intelligences can be present. Gardner and colleagues have also considered two additional intelligences, existential and pedagogical. The villains are a race of disembodied artificial intelligences known as "Sentients". The motivations of alien intelligences operating under ultra-ethical motives are explored. Many teachers use areas of Multiple Intelligences to provide learning opportunities. Howard Gardner gained prominence in the education sector for his Multiple Intelligences Theory. More recently, Howard Gardner has developed the theory of multiple intelligences. Additionally, it combines elements of the other two hot intelligences, personal and emotional intelligence. Minds, extremely powerful artificial intelligences, have an important role. The Waldorf curriculum has always incorporated multiple intelligences. The procreative process whereby the intelligences became spirits has not been explained. Instead, his results showed that each of his eight intelligences correlate positively with each other.