I personally do not really mind "alienating" the "earth is 5,000 years old" crowd by not respecting their complete and total disrespect for science and logic.

I personally do not really mind "alienating" the "earth is 5,000 years old" crowd by not respecting their complete and total disrespect for science and logic. If your wife told you that she was pregnant, but it wasn't your kid--would you believe her if she said the sperm just sort of came out of nowhere? Or would you say that it's not how conception (or marital faithfulness) actually works? (note: that's a general non-specific "your" up there, which does not refer to an actual wife, who if you have one I do not mean to in any way impugn)