"...the younger anointed contemporaries of those older anointed ones who discerned the sign when it became evident beginning in 1914 will not die off before the great tribulation starts!"
Among other things...
The problem here is that the "sign" (for the sake of argument we'll assume one exists...) evidently did not become "evident beginning in 1914".
There simply are no "younger anointed contemporaries of those older anointed ones who discerned the sign when it became evident beginning in 1914." The "spirit-directed Organisation" did not discern it "beginning in 1914" -- rather, the Watch Tower Society continued to use all the means at its disposal to preach its admittedly false message that the "Time of the End" had begun in 1799. (The doctrine that the "Time of the End" had begun in 1914 was first taught in 1929.)