It is the evolutionists which create arbitrariness. Heck in one of the posts here they call changing the sex call of an organism the creation of a new species! Guess Chinese are a different species than English, they talk a different language! I gave you non-arbitrary distinctions and explained the reasons for them in a post to Junior a few posts above this one. The distinctions for macro-evolution are: in taxonomy - a new genus, in terms of genetics a set of new genes, in terms of phenotype - new faculties and increased complexity.
gore3000: It is the evolutionists which create arbitrariness. Heck in one of the posts here they call changing the sex call of an organism the creation of a new species!
You seem to lose the thread of an argument rather quickly. Let me try staking down those flapping corners of your mind for you.
1) Creationists lump all demonstrated evolution as "microevolution," defining some "macroevolutionary" barrier which cannot be crossed.What is the barrier to prevent an accumulation of micro- changes becoming macro-, wherever you personally happen to place that dividing line?
2) "Macroevolution" is in fact an arbitrary distinction, defined all over the place depending upon to whom one is talking. Thus, it is like the legal age of majority, a legalistic categorization imposed by a beholder.
3) A categorization imposed by a beholder cannot function as a real-world barrier to change.