In this case, the obfuscation comes from the length of the tree; not many people have a monitor large enough to see more than just a fraction of this tree in the viewer.
Things don’t get that much clearer if you zoom in 😉
eX-SI
ICE, scripting, and other tech stuff about Softimage aka XSI
eX-SI 
Well, if you create an ICE Tree like that and then have to debug it,
you really have no one to blame but yourself.
😀
Out of curiosity: What should the tree accomplish, BTW?
It’s actually an ICE tree from the Rabbit rig example, but with every compound exploded (so I cheated to get the screenshot 😉