I know many of you despise the expression, "The truth"
I don't despise the expression. (I'm an unbelieving spouse of an active JW btw.)
I do think that as soon as you begin to refer to an abstract concept such as "Truth" as if it were a physical object that you "Have" or "Be In" you reveal a trait that is commonly associated with cults, which is the esoteric redefinition of common words. --Not saying that JW's are a "Cult", but this is considered to be a red flag.
We can easily put this to the test though. If you are an active JW in good standing, I would assume that you agree with and adhere to the transufsion medicine taboo, even if your life or the life of a dependent were at stake (?)
Can you defend that doctrine? Start a new thread if you like
If you can't then I would say that JW's may well be a cult.