In strict mode, can the return value of workflow activity be answered = true

[Xiaoyu]

prod instance has enabled strict model, the result is that the email cannot use answer in the place where the advance condition is used.only can use 

(function() {
  var groupMember = gs.getUser();
  return !groupMember.isMemberOf('XYZ');
})();

I want to know if the activity in workflow can use answer in strict mode, and if not, what should be used.

thanks！！！！！