(N Burbles, 1993, Dialogue on Teaching, Therory and Practice - Teachers College Press).
it's perhaps a bit much to make such a generalisation and it's certainly not in the forefront of everyone's mind, but there is the potential of possibility in 'learningful' conversations. There can be a freedom in some types of dialogues - where thoughts, feelings and ideas are fluid, explored, where there is uncertainty, where you do not know where it is going to lead. This is the opposite of what Peter Senge described as 'ping pong' conversation where each comment is tossed out and not even 'received' before the next is tossed out. No-one really listening and no-one receiving.
Just the act of being prepared to listen can provide the right space for someone to come to 'see' what they didn't 'know' before, to allow something to emerge. That may be enough for a decision to become clear.
Some conversations stay 'on the surface' - they can tend to follow well furrowed patterns. They have a predictableness about them. These allow people to hold onto their view, their perceptions.
In "The Fifth Discipline Fieldbook" (Peter Senge et al) , Isaacs and Smith describe creating environments that promote collective inquiry (from the Latin, inquarere, meaning to seek within). These, by contrast, encourage people to approach dialogue with no results in mind, but instead with the intention of developing deeper inquiry, wherever it leads you. To do this requires a willingness to touch on what is 'difficult', to allow conflict, to allow confusion, to allow painful letting go of tightly held structures/beliefs - or in other words, "a willingness to touch the dangerous".
The conductor Benjamin Zander encourages his music students when they have made a mistake to welcome it with an attitude of "how fascinating"! In meaningful dialogue where deep inquiry happens, the moment of disagreement is likewise cause for celebration - an opportunity to see what is below the surface, to welcome it in and to see what happens by exploring it further in a collective way. In Action Learning terms, it is the recognition of the need for an optimum amount of 'challenge'. It happens when there is a degree of trust - where people feel safe enough to expose some side of themselves they might normally protect (whether from others, from themselves, or both). In this way, there can truly be a sense of possibility.

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