that happens frequently.

the population can go over 90 if the you have 89 and the woman givesbirth to twin or triplets. it can also go over 90 if you get certain events that bring children to the island.
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Why is it that if someone tells you that there are 1 billion stars in the universe you will believe them,
but if they tell you a wall has wet paint you will have to touch it to be sure?