I see this a lot in abortion debates, because to find any common ground you would need to have a really deep philosophical discussion about the definition of li

I see this a lot in abortion debates, because to find any common ground you would need to have a really deep philosophical discussion about the definition of life. There's nowhere else to go from "I think it's murder", "I think it isn't". "Don't legislate my body" is completely irrelevant to people who think it's murder, and "stop killing babies" is nonsensical to people who think there aren't any babies involved.