Guys - you each understand what the other is saying...
RX-79G, maybe you're caught up in things, out maybe you're just being obtuse; but the answer to your question isn't shrouded in mystery: if a chisel ground blade is only sharpened on one side, and it is sharpened to a 30 degree angle, where is the confusion? It doesn't really matter whether one wants to use the term inclusive, does it? 30 degrees is 30 degrees, right?
I'm not trying to be obtuse - everyone understands the problem: How does one make an inclusive statement about edge angles of multiple knives without having to caveat it all by singling out chisel grinds?