I've used 'em a gazillion times.
Of course, I've noticed the leftists don't like to let the facts get in the way of their opinons.
But in the dark of night, before they go to sleep at night, occasionally a spec of truth gets through to them. They won't admit it but they know.
Just picked out some references and forwarded to everyone in my email address book. Unfortunately, I do have a few (including my own sister) that are big demoncRATS. With these references and others, I pull their tail and then get out of the way to let them snap and bark.