By definition, both are spilling over. But if I have to choose one, the cup that suits the definition the most would be cup no. 2. Both cups are different in that :
A) Cup 1’s contents are being “POURED” which may or may not be deliberate but is a fact. However, one cannot tell if cup 1 is full or not.
B) Cup 2 is spilling from the fact that it is full. Which is an undeniable fact as provided by the question
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