Logic and reason is why there is so much doctrinal disputation in the
Logic and reason by itself will not contradict truth. It is only when we apply assumptions within a logical framework that contradictions can occur. And this is what we see happened with the Pharisees. They wrongfully placed all of their conviction within one of many possible interpretations at the expense of other possible interpretations (including at the expense of a true understanding).
True scholars will recognize the difference between that which is necessarily true, that which is possibly true, and that which is necessarily untrue. Discerning truth by heart and mind led by the Spirit.
Differences in interpretation come in when people find possible interpretations differently compelling. And sometimes, these differences are rightly so. The truth for an ear that hears is foundationally different than the truth of an eye that sees. To the mind behind the body, each of these signals and reactions make sense and are valued, but to the individual body parts the other misleadingly seem completely foreign and disconnected from purpose.
We all have the truth we need at the time we have it. Disagreement and dispute is not necessarily a sign of disfunction or disassociation.
The soul is meant to be the organ of expression.
Heart and mind are aspects of the soul. We clearly aren't talking about the heart as a literal physical organ, nor the mind simply as brain structures. We can look at these as pathos and logos. And from the Holy Spirit (an ethos), these lead us to truth.
So in that, there is still a place for rational thought and discernment... without it, no words would have meaning... logic and reason are not something that can be tossed away. (And historically this has been a great starting grounds against nihilism)