No, this is not just a thread to discuss whether MMD was guilty or not of what Dany accused her of, but assumes MMD as innocent of what Dany accuses her of and kills her for, as all evidence points to everyone else making bad decisions or respond with violence.
It also assumes that MMD spoke the truth at all times and never intended harm or to revenge herself. It relies purely on rational evidence of events and key conversation by MMD, and it leads to an insight what MMDs true intent was at
I have another thought that builds on my previous comment (#136 in this thread) and seems off-topic at first but eventually may bring us back to Mirri Maz Duur.
I think GRRM wants us to compare Marwyn and Sam Tarly. Not just because they are both in the Maester business, although that is significant. We can also see that Sam is a living link between Maester Aemon, who explains part of the "dragon revival" prophecy in Sam's presence, and Marwyn who seems interested in getting to Dany's drago