Where bylaws or law requires a super-majority, i.e. 2/3's of all the members regardless of who is voting, an "abstention" or absence has the effect of a no vote. What about the situation where a member is disqualified from voting (because of non-payment of dues)? Does the fraction of (yes votes)/(all votes) include the disqualified voter in the denominator? To say she is included is to say she was given power to affect outcome even though bylaws or law provided otherwise. Hmm.