Originally Posted by Wolverine
A part of it means that it's a separate jutsu considering Banbutsu Sozo is the name given to the jutsu with both parts as a whole. Since one part is separated, it's a separate jutsu, derived from BS, since it needs a name.
Ok, lets put this to the test. Your body is BS and your arms and legs are Izanagai. Are they seperate because they have their own names or are they part of the body as a whole?
The fact that Izanagi now has a name, doesn't make it seperate from BS. It was always there and was a CRUCIAL part of BS. It just so happens that centuries later, the Sage's descendants will have access to a diluted and weaker version of a jutsu, the Sage used when performing BS.
Lol, its good that ppl can disagree without flaming. I respect you for that Wolverine