> On Dec 4, 2017, at 7:22 PM, Joe DeCapo via swift-evolution 
> <swift-evolution@swift.org> wrote:
>> The first one, has no static type info, no compile time checking, it's not 
>> self documenting, no type inference so people will be forced to use a 
>> dynamic reference at the call site to store the result, leading to more type 
>> loss, and all this spirals down.
> From what I can gather, `dynamic` is used when declaring types, but there's 
> no indication at call sites that what is being invoked is dynamic.

Upon rereading, I had assumed one could use `var` at the call site, but that 
may not be true. Even so, at the most there's still only one call site 
reference required, not for every following call site invocation.
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