The limits of philosophical demonstration › Cotton, fire, and the force of “must”

The seventeenth discussion asks whether departures from the ordinary course of nature are impossible. Al-Ghazali lists familiar connections, including drinking and the satisfaction of thirst, eating and the satisfaction of hunger, and contact with fire and burning. He denies that the connections have the necessity his opponents claim for them.

His cotton example separates two propositions. Burning occurs with contact. Burning occurs through the fire as an agent whose nature makes the result unavoidable under the stipulated conditions. Observation of the first does not, he argues, establish the second. The existence of an observed association leaves an explanatory question open.

One answer he develops attributes the production of the burning to God, directly or through mediation. On this account, the fire is not an independent agent that constrains divine action. God can create the contact without creating the burning. The ordinary sequence reflects divine action rather than an indissoluble connection between created things.

This answer is associated with occasionalism: the view that events ordinarily called natural causes are occasions for divine production of their effects. The term helps identify an argument in the discussion. It becomes misleading if it is used to conceal the other possibilities al-Ghazali considers.

Later in the same discussion, he offers a second answer. He grants that fire acts uniformly on similarly situated cotton, while allowing that God could alter a relevant property of the fire or of the body exposed to it. The proposed miracle would then involve a difference in the conditions under which the natural interaction occurs.

These answers have different explanatory structures. One directly challenges the necessity of the connection. The other grants a regular natural operation while disputing whether all relevant conditions must remain unchanged. The text's argumentative strategy does not require us to collapse them into one exclusive theory of how every event happens.