The 5/1 profile (Heretic / Investigator) is one of the twelve profiles of Human Design, a modern esoteric system originated in 1987 by Ra Uru Hu and presented here as a contemporary framework rather than ancient wisdom. A profile is formed from two of the six lines, a scheme the system borrows from the six lines of an I Ching hexagram and reads psychologically: the profile pairs a conscious line with an unconscious one to give an archetypal role. The 5/1 profile joins the roles named Heretic / Investigator. The line names and their meanings are Human Design's own twentieth-century reading, not a claim inherited from the Chinese classic whose six-line figures suggested the structure; they are described here as the system presents them, not as verified fact.
Human Design describes the fifth line, Heretic or Universal, as a practical, crisis solving line that draws projection from strangers, cast as saviour or scapegoat depending on outcome; the first line, Investigator, is described as needing a solid personal foundation built through study before it feels safe to act. The 5/1 profile combines the two: within the system's own framework, the practical solutions the fifth line offers under others' projection are understood to rest on a private, researched foundation the first line supplies underneath, which practitioners commonly describe as giving this profile's public problem solving an unusually well grounded, if still exposed, footing.