What’s your understanding of the mechanism that causes microevolution, and how would that mechanism differ in the case of macroevolution?
Jeepers atlaw, before I take your proffered hook here, might I ask you a few pertinent questions?
Why would you think there's a "common mechanism" as between micro- and macroevolution involved here in the first place?
I ask because microevolution has proved testable; simply put, macroevolution has not. So logically this implies that the properties and processes of known quantities (i.e., those obtained by direct observation, which is pretty much confined to microevolutionary observation and testing) cannot be extrapolated to unknown quantities (which cannot be obtained by direct observation — that is to say, macroevolution and its suppositional properties).
Since we are speaking of two distinct epistemological or categorical orders here, on what basis do you rely to defend your allegation that they have a "common mechanism" between them in the first place?
Just asking.
Thanks so much for writing, atlaw!