Reading Comprehension (RC) | Re: Nothing is sure but death and taxes, and of course that north is north

Broad Idea: Magnetic Reversal

P1: You can be sure of death and taxes but not North & South because in case of Magnetic reversal it flips
P2: Investigation of the rocks revealed the phenomenon and the average time after which N becomes S and S becomes N. The current polarity is called Normal Polarity and the opposite is called Reversed Polarity.
P3: Existence of magnetic reversal is certain but effect and why it happens is not clear. One explanation has been provided for it. Also, MR is correlated
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