hi. i'm trying to isolate two groups of users. the 1st is a group who has suffered one of 3 "negative" experiences, without regarding whether or not they also had "positive" ones - i.e., they are the users from the entire population,
who encountered one of 3 negative statuses in their user lifetimes.

the 2nd is based on this group, but users who have ONLY encountered these bad experiences, and never any good experience. for some reason, when i use && to "trim down" the positive statuses from the user group, i end up with the same size
groups, i.e. the following two codes yield the same powerpivot measure result:

=CALCULATE(DISTINCTCOUNT(CDRs[USERID]),

CDRs[disposition] = "negative exp 1" ||

CDRs[disposition] = "negative exp 2"||

CDRs[disposition] = "negative exp 3")

=CALCULATE(DISTINCTCOUNT(CDRs[USERID]),

CDRs[disposition] = "negative exp 1" ||

CDRs[disposition] = "negative exp 2"||

CDRs[disposition] = "negative exp 3"&&

CDRs[disposition] <> "positive exp 1"&&

CDRs[disposition] <> "positive exp 2"&&

CDRs[disposition] <> "positive exp 3")

i would love some help on this...

thx!