The beautiful irony here is that the question itself reveals a fundamental misunderstanding of how science works. You don't need multiple experiments to disprove a theory—you need exactly one that contradicts it. Meanwhile, you could run a million confirming experiments and still not "prove" the theory true, because that's the problem of induction David Hume warned us about centuries ago.
The problem of induction is basically this: just because something has happened repeatedly in the past doesn't logically guarantee it'll happen in the future. The sun rose yesterday, today, and a billion times before, but that doesn't prove it'll rise tomorrow—we just have really strong inductive reasoning to believe it will.
So the answer to Q1.1? One. Just one contradictory experiment can shatter a theory. But the student asking probably expects some large number, which is why Doctor Strange here is holding up that iconic finger like "buddy, we need to talk about falsification."
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