Rule? Ha. Half the time it breaks it.

Veil. Weight. Height. Seizure. Neighbour. Vein. Sleigh. Freight. Eight. Seize. Either. Weird. Foreign. Leisure. Neither.

And look! I is before E after C! Science. Species. Sufficient. Conscience.

Hardly a rule at all. Maybe like the "don't burn games" rule, in that it may be a rule but nobody follows it.

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