plaverbach wrote:
VeritasPrepKarishma, tnx for the reply, but I think that I have found the mistake!
"Premises:
Early settlers brought a special variety of sunflower plant to cultivate.
Today, all sunflowers are descendants of that variety. (So even if there were other varieties before, they are extinct now on this island)"
That is not true, they could easily crossbreed, and therefore the old varieties would have evolved, and would not be extinct!
Premises are always taken to be true. Since they have
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