For an example of the former, let's take Richard Dawkins, in "Why There Almost Certainly is No God" wrote:
It seems that Dawkins is lumping the "explanation for life" with evolution. Any explanation needs to include its origin as Dawkins subsequently makes clear. But Dawkins isn't the only one. The National Association of Biology Teachers has an "NABT Position Statement on Teaching Evolution" at its website that begins:
Next time, I'll address more fully the second point that descent with modification can't get started until life exists.