In nonverbal indication, the sign is not a spoken word. The book's smoke-and-fire example makes the point: no word for fire is heard, yet the visible sign directs the mind to fire.
Written marks, animal calls, and visible phenomena can also act as nonverbal signs in this classification. To classify them further, ask whether the connection rests on convention, natural disposition, or rational inference.
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Nonverbal indications
Dalālah, Waḍʿ and the Six Types of Indication
In nonverbal indication, the sign is not a spoken word. The book's smoke-and-fire example makes the point: no word for fire is heard, yet the visible sign directs the mind to fire.
Written marks, animal calls, and visible phenomena can also act as nonverbal signs in this classification. To classify them further, ask whether the connection rests on convention, natural disposition, or rational inference.