I don't know if this is the case with everyone. But,most Jehovah's Witnesses I know seem to have selective memory. They will deny straight to your face that in 1995 ,the generation, was explained to be the wicked contemporaries. That is until you have to find the article that explains it.
There are more examples of this,but it seems to come up a lot. They conveniently forget what they used to believe. Of course,sometimes it is the opposite and they still believe the old explanation. They don't even realize there is "new" light on the matter.
This happens a lot when dealing with family,or maybe it's just the older ones,I don't know.