Strange Watchtower lesson, that!
On the one hand it said that the anointed do not need anyone to tell them if they are anointed or not.
On the other hand, the Watchtower then proceeded to do just that: to tell who were anointed and who were not and could not possibly be!
Even if someone has professed to be anointed but came along after some arbitrary date, the legitimacy of their being of the anointed is called into question by the Watchtower, regardless of what the Spirit says to that individual!