hidden knowledge

Information kept secret

Hidden knowledge is information that exists but is concealed, restricted, or not readily accessible.

The phrase often carries mystical or conspiratorial overtones—occult traditions promise hidden knowledge to initiates, while conspiracy theories claim powerful groups suppress hidden knowledge from the public.

More neutrally, it can mean expertise that isn't written down: Much of the craft exists as hidden knowledge, passed from master to apprentice.

The appeal of hidden knowledge lies in the assumption that what's concealed must be valuable.

Opposites
accessibility

hidden knowledgecommon knowledge

Widely shared information

public knowledge · general knowledge · common sense · universal knowledge · public information

transparency

hidden knowledgepublic record

Officially accessible government information

open secret · open data · plain truth · official record

epistemic status

hidden knowledgecommon sense

Native practical judgment

basic facts · accepted truth · truism · axiom · given

Family

hidden, hide, hides, hiding, hider, unhidden, knowledge, know, knows

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G