One of the issues that really helped me open my eyes to the fallacy of the claims of the "Faithful and Discreet Slave" class is that they have not been right on anything they said would happen in the future. Every instance of "new light" is simply a hindsight adjustment and their attempt to allign the beliefs with what actually is happening or already occurred.
When you examine all of their dates, and what was supposed to happen on them, as well as the generation of 1914 and the date of the sealing of the annointed, etc, etc, can you think of anything the F&DS has accurately foretold by means of "Jehovahs" spirit.
Don