  Thus, in denying your conditional “If you give her penicillin, she will get better”, I am allowing for the possibility that giving her penicillin might have no effect on her, but I am not predicting that you will administer the penicillin and she will fail to recover. Nor does denying the apothegm (typically though inaccurately attributed to Dostoyevsky or Nietzsche) that if God is dead everything is permitted commit one to the conjoined proposition that God is dead and something is forbidden. As Dummett (1973: 328–30) puts the point, we must distinguish negation outside the scope of a Fregean assertion operator, not  (⊢p),  from the assertion of a negative proposition,  ⊢(not p).  The former interpretation “might be taken to be a means of expressing an unwillingness to assert” p, in particular when p is a conditional: