HOTSPUR POINTS OUT THAT CORRELATION DOES NOT IMPLY CAUSATION. In Henry IV Part I, at IIII, i, 12-21,
Owen Glendower says:
GLENDOWER
I cannot blame him: at my nativity
The front of heaven was full of fiery shapes,
Of burning cressets; and at my birth
The frame and huge foundation of the earth
Shaked like a coward.
And Hotspur replies:
HOTSPUR
Why, so it would have done at the same season, if
your mother’s cat had but kittened, though yourself
had never been born.