On Thursday, October 13, 2016 at 7:14:27 PM UTC+2, Peter Bruin wrote:
> Even though there is no coercion map in this situation, simply trying to 
> discover a coercion "taints" the target parent by registering the fact 
> that there is no coercion.

Then should we consider this behavior as a bug? There is a coercion rule 
that there can be at most one coercion from a parent to another parent, but 
it should not be disallowed to register one when there is none yet. Right?

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