The strongest argument I see on many exJW boards for immaturity is the unwillingness or possibly inability of many to look at an argument from both sides.
Many seem to take an entrenched position and just state, over and over again, what they wish to say.
Some even resort to ?foot stamping? when the other(s) will not come over to ?their side?
Being able to see what the ?other side? is saying, does not, IMHO, weaken ones position in the argument/discussion, it just gives an insight into the other persons thinking.
As an outsider (never a JW) this seems to me to be the biggest hangover that many have from JW days.
I realise, of course, that there are many in the world who also have this attitude, but if they are looked at critically, they always seem to come from a background of control in some way, or maybe sometimes, a position of some sort of (maybe perceived) power.