“Bristol really isn’t the sharpest knife in the drawer.”
And apples don’t fall far from the tree either.
Mom’s pretty sharp. Bristol does appear to be sadly dull. Piper seems pretty sharp like Mom.
If her other children are smart and lead smart, successful lives (such as Sarah has led), will you say the apple doesn’t fall far from the tree?
Your bias is showing.
And apples don’t fall far from the tree either.
How many of the children of great and historic Americans have ever measured up to the achievements of their famous parents?
Answer: very, very few.
Your metaphor falls short of observed reality, and does not apply to Sarah and Bristol Palin.
“And apples don’t fall far from the tree either.”
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Ronald Prescott Reagan seems to have fallen two or three states away from the tree.