On the one hand (emphasis tail-waggingly added):
1. capable of being believed; believable: a credible statement.
2. worthy of belief or confidence; trustworthy: a credible witness.
Blogging Tory "Kitchener Conservative" would beg to differ:
I'm not saying I agree with what's posted at LifeSite, but not credible by who's authority? Your's or someone else that doesn't agree with them. It's obviously a site based on religious belief, but that doesn't automatically bring discredit on any opinions expressed there.
Isn't the credibility of opinion based on "What's in the eye of the beholder"?
What a novel perspective. So tune in tomorrow when we here at CC HQ explain how describing someone as an "ignorant slut" and "dumb cunt" is simply a form of affectionate endearment and profound respect. Because we say it is.