To all the posters here I'll just say this: you got everything covered.
Hello Mr. Evans,
Like many people on the Metafilter web site, I've enjoyed your comic for years -- it's one of two that I check every day!
Several people are wondering what's up with today's "three out of four" line, though. We think we're missing some cultural context or something.
If it will all make sense tomorrow, that's fine, but is there any chance you'd be willing to comment in this discussion thread about today's strip?
I'll be happy to post any comment you'd like to make (or to get an account for you, or you can of course get an account if you like).
Please forgive some of the more unsavoury ideas -- we're just casting about trying to come up with explanations.
I just posted a new blog, "Three Out Of Four?" at my site, TheCartoonistStudio.com/Greg. Click the GREGBLOG icon. Warning: this blog may ruin your day...
Although I guess since this whole thing stands to become the defining question of our time I may have to adjust my expectations about the universe.