There are so many religious claims floating about the web, a huge number of these make a statement without providing any reason whatsoever as to why it should be true. A pretty important factor if you ask me!
You don’t have to be harsh or heavily critical in a response. The above responses are enough to push a claim out of it’s comfort zone.
One word can make a belief stumble. If one word can do that, it should make that believer reconsider.