You've got to honor your relationship with your audience - that they sit down because they want to be entertained. And that doesn't mean you can't provoke them and antagonize them and challenge them in the course of the entertainment as long as you keep the entertainment part of the equation alive.
The hypothesis may be put forward to be tested by the s subsequent investigation that this development has been in large part a matter of the reciprocal interaction of new factual insights and knowledge on the one hand with changes in the theoretical system on the other.