John Paul writes:
It is not up to me to provide a barrier.
Yes it is. You are the one claiming that small changes can't add up to large ones. The small changes have been undeniably demonstrated, i.e. that 1 + 1 = 2. It is up to you to demonstrate that 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 10. (btw that analogy was shamelessly lifted from Rrhain)
It is up to you to provide POSITIVE evidence to support your case.
It has been provided. That you believe there to be limitations on the variability of morphology over time is your burden to prove.
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