Hi Doug,

> On Nov 30, 2017, at 4:28 PM, Douglas Gregor via swift-evolution 
> <swift-evolution@swift.org> wrote:
> I think this approach is more predictable and more implementable than the 
> current model. I’m curious whether the above makes sense to someone other 
> than me, and whether it covers existing use cases well enough. Thoughts?

I don’t have a lot to add here, except to say: Yes, this makes sense to me, and 
is much easier to reason about. The three new rough rules covers all of the 
Swift protocol code I can think of that I’ve written, and seems complete for 
any reasonable set of thought experiments I’ve come up with so far.

        - Greg
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