[Taxacom] Dispersal clarifications

[Jason Mate]

Michael,
sorry for not replying sooner. After reading your email I am even more confused than before. Do you think you could answer the following questions?:
What is a dispersalist? Name tags may be useful to create a sense of us-and-them but it seems like a red herring.
Chance. I´ve seen your reply to Richard but it is not very clear. Maybe you are talking about probability? If so, are you saying that "dispersalists" (whatever they may be) are invoquing some sort of magical forces? 
What is ecological dispersal? I am interested in your operating definition.
Geographic structure: are you claiming this is evidence for vicariance?
How would you falsify vicariance? Just curious.

Best
Jason