The characteristic claim of a kāhin concerns future events, whereas an ʿarrāf claims to discover concealed things through particular signs.
The former is described through dealings with jinn and the mixing of falsehood into reports; the latter through reliance on stars and signs. Both fall under the refusal to affirm such claims as religiously authoritative.
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Soothsayers, Diviners and Claims Contrary to Revelation
The characteristic claim of a kāhin concerns future events, whereas an ʿarrāf claims to discover concealed things through particular signs.
The former is described through dealings with jinn and the mixing of falsehood into reports; the latter through reliance on stars and signs. Both fall under the refusal to affirm such claims as religiously authoritative.