Communicating why you believe in A is a different goal than communicating reasons why it makes sense for another person to believe in A.
When it comes to the later, scientific evidence is more important than it is for the former.
I somewhat agree, but I am a little confused about it.
Focusing on truth rather than status in a conversation tends to save time with respect to the goal of truth.
Conveying reasons is an important sub-goal of conveying truth, especially when we can't fully trust each other's rationality.
Conveying scientific reasons only rather than personal reasons, and therefore restricting to only scientifically established truths, sounds like a safeguard to keep science from being contaminated by weird beliefs held by compartmentalized thinkers or simply poor rationalist...
Cross-posted to my blog.
A while ago, I wrote about epistemic trust. The thrust of my argument was that rational argument is often more a function of the group dynamic, as opposed to how rational the individuals in the group are. I assigned meaning to several terms, in order to explain this:
Intellectual honesty: being up-front not just about what you believe, but also why you believe it, what your motivations are in saying it, and the degree to which you have evidence for it.
Intellectual-Honesty Culture: The norm of intellectual honesty. Calling out mistakes and immediately admitting them; feeling comfortable with giving and receiving criticism.
Face Culture: Norms associated with lack of intellectual honesty. In particular, a need to save face when one's statements turn out to be incorrect or irrelevant; the need to make everyone feel included by praising contributions and excusing mistakes.
Intellectual trust: the expectation that others in the discussion have common intellectual goals; that criticism is an attempt to help, rather than an attack. The kind of trust required to take other people's comments at face value rather than being overly concerned with ulterior motives, especially ideological motives. I hypothesized that this is caused largely by ideological common ground, and that this is the main way of achieving intellectual-honesty culture.
There are several subtleties which I did not emphasize last time.