An unfortunate error, as in "hey, where did the other riders go, Philippe?", or was it Philippe's idea and Cadel just went along with it? As the media experts have reminded us often, he just doesn't attack ;-)
Silence-Lotto's Philippe Gilbert and Cadel Evans put in a strong attack and crested the summit 15 seconds ahead of their pursuers with only 11.3 kilometres remaining.
We can at least say they both have some form, although they weren't able to hold off the chasers in the end.