In one sentence, they claim to speak for God.
In the next sentence, they are just humble men, subject to error, trying their best.
Either way, JWs must agree with everything they currently teach or get kicked out of the Kingdom.
"We mustn't be dogmatic" about who will or won't be resurrected in the end times, but we know about all sorts of invisible happenings in 1914 and that the "generation of 1914" overlaps.