If the head of a restrictive relative clause does not function as the subject of the restricting clause then that subject must refer independently of the head.
Standardized
IF the head of a restrictive relative clause does not function as the subject of the restricting clause, THEN that subject must refer independently of the head.
Considered to replace the Crossover Principle (Postal 1971) explaining especially Japanese (Japanese-Ryukyuan) and Basque (isolate). (Keenan 1974: 305)
Considered to replace the Crossover Principle (Postal 1971) explaining especially Japanese (Japanese-Ryukyuan) and Basque (isolate). (Keenan 1974: 305)