The Kybosh house rule

A friend is playtesting TOEM in a classroom setting. He came up with the term PROCON to identify the phase in which all are invited to provide PROs and CONs to an argument. More interestingly, there are a few innovations that are worth thinking through further. One of them is what I'll call the Kybosh rule:

The Kybosh house rule

Following the submission of an initiative, the referee tallies the number of PRO and CON that are rejected. When three such PROCONs are rejected, the PROCON phase terminates and the initiative is resolved.

Rationale
This rule tackles the problem arising with hair splitting for PROCON.  The most significant PROCONs are more likely to be itemized first. When the PROCON devolves into a laundry list of unacceptable facts/arguments, this is probably because nothing of value will be added to the discussion.

How to break the game with this rule

1. The conch holder proposes an initiative with a number of PROs and three lousy CONs. The result is that no one gets to contribute valid CONs.  

This can be circumvented by letting everyone talk and resolving all PROCON as a batch. A complete PROCON brainstorm ensures that all who wanted to talk either have talked, or intentionally passed. 

Final draft of proposed house rule

A full round of PROCON implies that all who wanted to contribute are given the chance. First, all PROCON from the conch holder and considered. Then, the referee tallies the number of PRO and CON from other players that are rejected. When three such PROCONs are rejected, the PROCON phase terminates and the initiative is resolved. Further rounds of PROCON may be allowed otherwise.