JIRA defines Open as a Status of UNRESOLVED. This is a system status that we cannot change.
The confusion comes when the Issue moves through the workflow.

For example:

An issue is assigned to a developer.

> Developer decides that he cannot fix it because he cannot reproduce it
> so he Clicks on Not Fixed and sets the Resolution to Cannot Reproduce.
>
> This sends the bug back to In Review.
>
> When we send it back from In Review to the developer we current cannot
> reset the resolution.
>
> So we end up with a bug In Development with a status of Cannot Reproduce.
>
> *Question 1: Is there a way to reset the resolution to UNRESOLVED so
> that it shows up as an Open issue?*

> *Question 2: If we cannot do this, then can we add a resolution to
> handle these cases but more precisely can we control the Resolutions to
> be smart as to where they appear. In other words tie resolutions to the
> Workflow functions?*