One of the simplest ways to look at this is the very obvious fact that the prophecy of 1914 (the most obvious date based on this) simply did not work.
They fully expected the establishment of Christ's kingdom on earth that year (having expropriated the Adventists 1874 date and extending it out by 40 years. Later they wimped out and sort of claimed that they had prophesied WW one. That was not true - it was a coverup for a end-date that failed, just like 1844/1845 and 1874 before had failed.
It doesn't matter if the 607 was right or wrong (and almost anybody with any credibility says that 607 is wrong) --- it still does not mean anything whatsoever if you cannot use it to add up to anything meaningful. Which the JWs have manifestly not - they are the poster organization for false end-time prophecy in the eyes of all religious observers.
Note that now the "generation" of 1914 idea has been shelved, as hardly anybody old enough to remember 1914 or C.T.Russell is even still alive.
Note also that Russell himself had sort of come up with 1914 in an alternate way by pyramid dimensional math games. That had to be jettisoned for reasons of weirdness and possible occultic spiritism. Also consider a previous poster who points out very nicely that the 2520 years can only be extracted from the bible by a very obtuse mechanism.
For these reasons, I refuse to debate the merit or non-merit of the silly 607 date. Their prophecy based on dates has always failed, and so that is the end of the story.
