You still haven't explained why God could or could not have used nested hierarchy. All I have read is your opinion.
I have explained it. There is absolutely no reason why any designer would be limited to a nested hierarchy, therefore the common designer hypothesis does not predict a nested hierarchy. Any pattern of shared and derived features is as likely as any other. A fossil or living species with a mixture of bird and mammal features is just as likely as one with a mixture of mammal and reptile features. For just 30 characteristics, there are 4.9518e+38 possible ways of combining those characteristics. That is a 4 with 38 zeros after it.
With evolution, this isn't true. For groups of species that evolve from common ancestors and don't participate in any meaningful amount of horizontal genetic transfer, there is only ONE pattern of shared and derived features that we should see, and that is a nested hierarchy. Going back to those 30 characteristics and 4E38 possible ways to combine them, there are only a handful of possible trees that would fall in line with evolution. So do they? Yes.
"In spite of these odds, the relationships given in Figure 1, as determined from morphological characters, are completely congruent with the relationships determined independently from cytochrome
c molecular studies (for consensus phylogenies from pre-molecular studies see
Carter 1954, Figure 1, p. 13;
Dodson 1960, Figures 43, p. 125, and Figure 50, p. 150;
Osborn 1918, Figure 42, p. 161;
Haeckel 1898, p. 55;
Gregory 1951, Fig. opposite title page; for phylogenies from the early cytochrome
c studies see
McLaughlin and Dayhoff 1973;
Dickerson and Timkovich 1975, pp. 438-439)."
http://www.talkorigins.org/faqs/comdesc/section1.html#independent_consilience
So why would a designer limit itself to 1 pattern out of 400,000,000,000,000,000,000,000,000,000,000,000,000? Why pick the one pattern that evolution would produce when there are so many other patterns?