You can also read more about some of the thinking that went into developing the one-liners in a blog post about them on Skeptical Science. Oh, and if you're not familiar with Skeptical Science, here's how they describe themselves:
Scientific skepticism is healthy. Scientists should always challenge themselves to expand their knowledge and improve their understanding. Yet this isn't what happens in global warming skepticism. Skeptics vigorously criticise any evidence that supports man-made global warming and yet uncritically embrace any argument, op-ed piece, blog or study that refutes global warming.
So this website gets skeptical about global warming skepticism. Do their arguments have any scientific basis? What does the peer reviewed scientific literature say?
They even have an iPhone/iPad app.
You really should go read the whole blog post about the one-liners, but there's one paragraph that I found particularly interesting:
I finally saw my problem was trying to cram every bit of science into my short answer as possible, in order to make the paragraph bullet proof to any objection. But Jan had the right approach - just "bat the ball back over the net" and get into the nitty gritty afterwards. So I'm immensely grateful for Jan for both providing some immensely useful content and also teaching me a lesson about science communication. (emphasis added)
That's John Cook describing his reaction when he saw how Jan Dash had re-written them into one liners. Look at that highlighted phrase again:
Just "bat the ball over the net" and get into the nitty gritty afterwards.
That's the key. To communicate science, to communicate anything, you have to get your audience's attention. That's not the time for qualifiers and complications. It's the time to get them interested. As Randy Olson would say, "Arouse and fulfill."