Remarks. The preceding method for proving Fact 1.3 is directed specifically toward conjunctivity as defined relative to complex conjuga- tion, but it obviously applies equally well to cases where conjunctivity is defined relative to a more general notion of conjugation (see, e.g., [6, p. 62]), except where the field has characteristic 2. (Fact 1.3 holds even when the characteristic is 2, provided the definition of conjugation in [6, p. 621 is suitably modified; the proof requires corresponding modification.) Fact 1.3 is erroneously given in [13, p. 941 for congruence (rather than for conjunctivity). A correct version for congruence is given in [3, Theorem 11.