[Wallace T.]

Not inconceivable. Michelle Obama was born in 1964. My sister was born in 1957. Our father's paternal grandfather was born in 1840.

[AbolishCSEU]

See PBRCat’s post. Most American Blacks have their first child at a very early age, and the cycle repeats so that it is more like Michelle’s great great great great great great great great grandparents (on the white side) that were abolishionists.