In nonverbal-natural indication, the indicator is not an uttered human word, and the connection reflects a creature's nature or condition.
The book gives a horse's neigh as indicating a desire for fodder.
Indicator: the neigh.
Indicated state in the example: desire for food.
Basis: natural expression.
A real horse may neigh for several reasons, so the textbook example illustrates a kind of connection rather than proving hunger from every neigh.
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Nonverbal-natural: an animal call
Dalālah, Waḍʿ and the Six Types of Indication
In nonverbal-natural indication, the indicator is not an uttered human word, and the connection reflects a creature's nature or condition.
The book gives a horse's neigh as indicating a desire for fodder.
Indicator: the neigh.
Indicated state in the example: desire for food.
Basis: natural expression.
A real horse may neigh for several reasons, so the textbook example illustrates a kind of connection rather than proving hunger from every neigh.