Pragma-Dialectic’s Necessary Conditions for a Critical Discussion

I present a “reduced” version of the fifteen Pragma-dialectical rules and inquire into their theoretical status as necessary conditions for a critical discussion. Questions: (i) In what respect is PD’s non-sufficiency a deficiency, (ii) can and (iii) must it be remedied? Brief answers: (i) with respect to defining the concept ‘critical discussion,’ (ii) possibly, (iii) yes, if, and only if, one seeks to identify the concept ‘critical discussion’; no, if PD is for fallacy-detection