i would rather agree with Jonathan.

CBMP and CBM is absolutely two different and independent techniques. you can do any one of them w/ or w/o the other.

Sri insisted that "CBMP cannot exist without CBM". i think it's incorrect.

i'll try to give another examples.

the 3rd step of feather step. this step in taken in CBMP but no CBM.

the promenade link in tango, man may turn 1/8 to R or L, or none. when he turns to R, he needs a CBM in step 2 while not for the other two cases. however, in all cases, step 2 is taken in CBMP. RF fwd turning to L does not construct a CBM.

the argument of Jonathan is more reasonable.

pls give further comment if any one disagrees.

terence