maybe we have discussed this before, maybe not.

I have been trying to eliminate the building skill from one of my established villages. I have not let anyone with any building skill breed for generations now. No babies are being born with building skill. I know I am not giving the villagers any experience in the area. However, they continue to show up. Half of my villagers keep managing to get the skill.

This obviously aggravates me. I thought that villagers didn't just magically learn things. They had to be taught it, or be born with it. Have I don't something wrong?
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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?