A homogeneous grain heap allows one standard measure to be supplied without a dispute over which individual grains belong to the buyer.
That explains why one qafiz can be treated as a known minimum unit, but it does not mean Abu Hanifah validates the remainder of an unquantified per-unit sale.
The ambiguity about aggregate quantity and price remains central.
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Kitab al-Buyu: Grain Sales, Bulk Heaps, Qafiz and Unit Prices
A homogeneous grain heap allows one standard measure to be supplied without a dispute over which individual grains belong to the buyer.
That explains why one qafiz can be treated as a known minimum unit, but it does not mean Abu Hanifah validates the remainder of an unquantified per-unit sale.
The ambiguity about aggregate quantity and price remains central.