For example, they were really into Georgi Lozanov's "Super learning" which on the surface simply seems like a memorization technique to help learn things like f

For example, they were really into Georgi Lozanov's "Super learning" which on the surface simply seems like a memorization technique to help learn things like foreign language vocabulary like are common now with tools like Anki, but Lozanov was also a self-described "parapsychologist" who believed that such techniques would expand human capabilities and allow clairvoyance!