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dsgrue3 said:

We can certainly observe the splitting of cells, this is testable. We can absolutely confirm the existence of the new cell via observation. Not sure what your point is?

For that specific cell, we could confirm its existence via observation. But prior to observing it, we couldn't say whether that cell existed or not, though it exists. The fact that we can confirm existence and the existence of an object are two fundamentally distinct properties, the second (confirmation of existence) based on the first (existence).