APOSTATE NOT JUST TEACHING BUT BELIEVING "OTHER DOCTRINE" PER WTS
http://www.jwfacts.com/watchtower/blog/apostate.php
The Society’s Definition
The Watch Tower Society has a slightly more specific idea as to what “apostasy” means. To find it (in a way that is expressed in clear terms), we must consult a letter that was sent out to all Circuit and District Overseers, dated September 1st, 1980. One paragraph in the letter reads as follows:
Notice how the Society’s definition of “apostasy” (or “apostatizing”) differs substantially from the basic biblical definition in two key areas:
An apostate is not just someone who “promotes” apostate views (i.e. by trying to “draw off followers” after themselves) – he is someone who believes things that run contrary to the “faithful and discreet slave”. An apostate is not just someone who disagrees with what the Bible teaches about God – he is someone who rejects “what he has been provided through the slave class”.
Just thinking differently to any of the Governing Body’s teachings is enough to be an “apostate” Hence, the Watchtower’s view of apostasy is different, and more specific, than the Bible’s definition. To be an apostate, all you need to do is view things differently to the “faithful and discreet slave” (now identified as the Governing Body). Period. It doesn’t even matter whether you go to strenuous efforts to promote or convince others of your beliefs. You simply have to view Bible teachings differently to how they are expressed in Watchtower publications, and you are automatically considered an “apostate”, worthy of disfellowshipping.
It is for this reason that many are disfellowshipped for apostasy even if they go to strenuous efforts during their judicial committee to demonstrate that their beliefs do not contradict what is written in the Bible. In the minds of elders who stick to the Society’s guidelines, it is irrelevant whether your beliefs can be backed up by the scriptures. What matters most is that you agree with the Governing Body and everything that it teaches. If you don’t, you are an “apostate” according to the Society’s definition of that term.