The Cannondale is lugged, there are only 2 ways Lugged and Monocoque. The Oxford dictionary defines lug as fixed in place. The carbon is fixed in place. even if you build a frame and then cut out the sections, what you are left with are lugs.
So dose that mean my shoes are lugged when fixed in my pedals place? Or how about my wheels, there fixed in place, so they muct be lugged to!
That definition is pretty broad, with it, if you take it word for word as you have pretty much everything in the world is lugged. The definition doesn't really apply directly to bicycle, just in general.
I spoke to the cannondale rep, he gave me very detailed information about the frameset. Even he told me that it is not lugged, as cannondale claims
their method is far supperior to lugged frames.
It would still be possible to take the two materials apart once in the frame
No it isn't, as the bond from aluminum to carbon is both a mechanical and chemical bond. Lugged frames only have chemical bonds, not mechanical. I held a chopped up six 13 in my hands, and saw the mechanical bond.
Heres a pic, notice the whole rear triangle, pretty much one piece. If there is a lug on the bike it is the head tube, but it isn't because the aluminum is all welded together and then seemlessly transfer into carbon.