The correction is appreciated. But it's not strictly relevant toi Poe's original question, which he has pressed me to reply to.
Even correcting (1), the thrust of the argument I gave stands: The point of reproduction was that true, forms are formative, not matter, but matter has its own forms, as well as externally-imposed forms i.e. environmental pressures.
I've reproduced - heh - the propositions I gave earlier.
(1) The substantial form is [what is passed on from parent to child - edited]; the matter is the culprit of corruption.
(2) Living matter is full of its own subordinated form. . . .
(4) Corruption is due to the matter, not to the substantial form.
(4.1) The subordinate forms are the cause of matter's refractory nature. So, in a way corruption is also due to form - but not the substantial one. . . .
(5.1) Some departures . . . are not corruptions of substance. . . . But some corruptions are corruptions of substance.
(5.2) "What makes a man? A man, and the Sun.". . . Where one form begins to fail to master the matter, other forms can become prominent. And with 'the Sun', i.e. an engine of change like environmental pressure, the altered substance need not be merely a crappy, less optimal version of its parents.
(6) There is no restriction on the number of kinds of substantial forms.
(6.1) And thus, there is every reason that children can depart from parents by any amount the matter can thwart, yet still be a substance.
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(7) And so with these conceptual tools, there is at least the start of an account for the evolution of biological species.
Thanks,
Chris