My fundy at work asserts that Iraq did have WMDs when the CIA said they did, thus justifying our invasion. He says that the mere fact that we can scour the country now and not find them does not mean they weren't there.
When I asked if there was any concievable evidence that we could ever find that would demonstrate the CIA was wrong, he said "No."
But he objected when I pointed out that made the CIA claim unfalsifiable. He knows thats a bad thing. Of course he couldn't explain how a claim could not be shown to be false under any possible circumstance, and yet still qualify as falsifiable.
This is an example of what I call the "bleeding" effect. You can't walk around telling yourself that God is believable and reasonable even though the concept is unfalsifiable, and not start to apply that reasoning to other issues. This is how religion harms me: it makes idiots out of my fellow citizens, whose votes affect my life in a material and significant way.